- Ricardo G. Hubner;
Cristiano Fragassa; Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Maycon da S. Paiva; Maycon da S. Paiva
Harvested from ORCID Public Data FileMaycon da S. Paiva in OpenAIRE Phelype H. Oleinik; +5 AuthorsPhelype H. Oleinik
Harvested from ORCID Public Data FilePhelype H. Oleinik in OpenAIRERicardo G. Hubner; Cristiano Fragassa; Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Maycon da S. Paiva; Maycon da S. Paiva
Harvested from ORCID Public Data FileMaycon da S. Paiva in OpenAIRE Phelype H. Oleinik; Phelype H. Oleinik
Harvested from ORCID Public Data FilePhelype H. Oleinik in OpenAIRE Mateus das N. Gomes; Luiz A. O. Rocha;Mateus das N. Gomes
Harvested from ORCID Public Data FileMateus das N. Gomes in OpenAIRE Elizaldo D. dos Santos; Elizaldo D. dos Santos
Harvested from ORCID Public Data FileElizaldo D. dos Santos in OpenAIRE Bianca N. Machado; Bianca N. Machado
Harvested from ORCID Public Data FileBianca N. Machado in OpenAIRE Liércio A. Isoldi; Liércio A. Isoldi
Harvested from ORCID Public Data FileLiércio A. Isoldi in OpenAIREThe present study aims to evaluate the difference in the fluid-dynamic behavior of an overtopping wave energy converter under the incidence of irregular waves based on a realistic sea state when compared to the incidence of regular waves, representative of this sea state. Thus, the sea data of three regions from the Rio Grande do Sul coast, Brazil, were considered. Fluent software was employed for the computational modeling, which is based on the finite volume method (FVM). The numerical generation of waves occurred through the imposition of the velocity boundary conditions using transient discrete values through the WaveMIMO methodology. The volume of fluid (VOF) multiphase model was applied to treat the water–air interaction. The results for the water amount accumulated in the device reservoir showed that the fluid-dynamic behavior of the overtopping converter has significant differences when comparing the two proposed approaches. Differences up to 240% were found for the water mass accumulated in the overtopping device reservoir, showing evidence that the results can be overestimated when the overtopping device is analyzed under the incidence of the representative regular waves. Furthermore, for all studied cases, it was possible to approximate the water volume accumulated over time in the overtopping reservoir through a first-degree polynomial function.
Access RoutesGreen gold 10 citations 10 popularity Top 10% influence Average impulse Top 10% 
Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jmse10081084&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Ricardo G. Hubner; Cristiano Fragassa;
Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Maycon da S. Paiva; Maycon da S. Paiva
Harvested from ORCID Public Data FileMaycon da S. Paiva in OpenAIRE Phelype H. Oleinik; +5 AuthorsPhelype H. Oleinik
Harvested from ORCID Public Data FilePhelype H. Oleinik in OpenAIRERicardo G. Hubner; Cristiano Fragassa; Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Maycon da S. Paiva; Maycon da S. Paiva
Harvested from ORCID Public Data FileMaycon da S. Paiva in OpenAIRE Phelype H. Oleinik; Phelype H. Oleinik
Harvested from ORCID Public Data FilePhelype H. Oleinik in OpenAIRE Mateus das N. Gomes; Luiz A. O. Rocha;Mateus das N. Gomes
Harvested from ORCID Public Data FileMateus das N. Gomes in OpenAIRE Elizaldo D. dos Santos; Elizaldo D. dos Santos
Harvested from ORCID Public Data FileElizaldo D. dos Santos in OpenAIRE Bianca N. Machado; Bianca N. Machado
Harvested from ORCID Public Data FileBianca N. Machado in OpenAIRE Liércio A. Isoldi; Liércio A. Isoldi
Harvested from ORCID Public Data FileLiércio A. Isoldi in OpenAIREThe present study aims to evaluate the difference in the fluid-dynamic behavior of an overtopping wave energy converter under the incidence of irregular waves based on a realistic sea state when compared to the incidence of regular waves, representative of this sea state. Thus, the sea data of three regions from the Rio Grande do Sul coast, Brazil, were considered. Fluent software was employed for the computational modeling, which is based on the finite volume method (FVM). The numerical generation of waves occurred through the imposition of the velocity boundary conditions using transient discrete values through the WaveMIMO methodology. The volume of fluid (VOF) multiphase model was applied to treat the water–air interaction. The results for the water amount accumulated in the device reservoir showed that the fluid-dynamic behavior of the overtopping converter has significant differences when comparing the two proposed approaches. Differences up to 240% were found for the water mass accumulated in the overtopping device reservoir, showing evidence that the results can be overestimated when the overtopping device is analyzed under the incidence of the representative regular waves. Furthermore, for all studied cases, it was possible to approximate the water volume accumulated over time in the overtopping reservoir through a first-degree polynomial function.
Access RoutesGreen gold 10 citations 10 popularity Top 10% influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jmse10081084&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Yuri Theodoro Barbosa de Lima; Liércio André Isoldi; Elizaldo Domingues dos Santos;
Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; +3 AuthorsBianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIREYuri Theodoro Barbosa de Lima; Liércio André Isoldi; Elizaldo Domingues dos Santos;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; Bianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIRE Mateus das Neves Gomes; Mateus das Neves Gomes
Harvested from ORCID Public Data FileMateus das Neves Gomes in OpenAIRE Cesare Biserni; Cesare Biserni
Harvested from ORCID Public Data FileCesare Biserni in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIREThis research conducts a numerical study of a wave energy converter (WEC) device with five coupled hydropneumatic chambers, operating based on the principle of an oscillating water column (OWC). A turbine was not included, only considering the tube without it. The computational domain was defined by a wave channel housing an OWC device subjected to regular incident waves. The central objective was to assess the impact of chamber geometry on maximizing the total hydropneumatic power in energy conversion. The numerical simulations consider the pressure, mass flow rate, and total hydropneumatic power, with the latter being the performance indicator. To determine the geometries to be analyzed, the Constructal Design method was employed in conjunction with the exhaustive search optimization method to maximize the performance indicator. The degrees of freedom defined were the ratios between the height (Hn) and the length (Ln) of the hydropneumatic chambers (Hn/Ln, where n varies from one to five). Based on the results of the mass flow rate and pressure, their influence on power was evaluated. It was observed that the influence of the degrees of freedom on the pressure difference, mass flow rate, and hydrodynamic power was quite similar, displaying an increase for low ratios of Hn/Ln up to a maximum magnitude and followed by a decrease in magnitude. The best performance was achieved for the geometric configuration with Hn/Ln = 0.2613 (Hn = 5.0625 m and Ln = 15.8219 m), representing an improvement of 98.6% compared to the worst case analyzed.
Access RoutesGreen gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/fluids9040086&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Yuri Theodoro Barbosa de Lima; Liércio André Isoldi; Elizaldo Domingues dos Santos;
Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; +3 AuthorsBianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIREYuri Theodoro Barbosa de Lima; Liércio André Isoldi; Elizaldo Domingues dos Santos;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; Bianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIRE Mateus das Neves Gomes; Mateus das Neves Gomes
Harvested from ORCID Public Data FileMateus das Neves Gomes in OpenAIRE Cesare Biserni; Cesare Biserni
Harvested from ORCID Public Data FileCesare Biserni in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIREThis research conducts a numerical study of a wave energy converter (WEC) device with five coupled hydropneumatic chambers, operating based on the principle of an oscillating water column (OWC). A turbine was not included, only considering the tube without it. The computational domain was defined by a wave channel housing an OWC device subjected to regular incident waves. The central objective was to assess the impact of chamber geometry on maximizing the total hydropneumatic power in energy conversion. The numerical simulations consider the pressure, mass flow rate, and total hydropneumatic power, with the latter being the performance indicator. To determine the geometries to be analyzed, the Constructal Design method was employed in conjunction with the exhaustive search optimization method to maximize the performance indicator. The degrees of freedom defined were the ratios between the height (Hn) and the length (Ln) of the hydropneumatic chambers (Hn/Ln, where n varies from one to five). Based on the results of the mass flow rate and pressure, their influence on power was evaluated. It was observed that the influence of the degrees of freedom on the pressure difference, mass flow rate, and hydrodynamic power was quite similar, displaying an increase for low ratios of Hn/Ln up to a maximum magnitude and followed by a decrease in magnitude. The best performance was achieved for the geometric configuration with Hn/Ln = 0.2613 (Hn = 5.0625 m and Ln = 15.8219 m), representing an improvement of 98.6% compared to the worst case analyzed.
Access RoutesGreen gold 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/fluids9040086&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - J.C. Martins; M.M. Goulart;
J.C. Martins
Harvested from ORCID Public Data FileJ.C. Martins in OpenAIRE M. das N. Gomes; M. das N. Gomes
Harvested from ORCID Public Data FileM. das N. Gomes in OpenAIRE J.A. Souza; +3 AuthorsJ.A. Souza
Harvested from ORCID Public Data FileJ.A. Souza in OpenAIRE J.C. Martins; M.M. Goulart;J.C. Martins
Harvested from ORCID Public Data FileJ.C. Martins in OpenAIRE M. das N. Gomes; M. das N. Gomes
Harvested from ORCID Public Data FileM. das N. Gomes in OpenAIRE J.A. Souza; J.A. Souza
Harvested from ORCID Public Data FileJ.A. Souza in OpenAIRE L.A.O. Rocha; L.A.O. Rocha
Harvested from ORCID Public Data FileL.A.O. Rocha in OpenAIRE L.A. Isoldi; L.A. Isoldi
Harvested from ORCID Public Data FileL.A. Isoldi in OpenAIRE E.D. dos Santos; E.D. dos Santos
Harvested from ORCID Public Data FileE.D. dos Santos in OpenAIREAbstract Current work aims to study the geometry of an overtopping wave energy converter in real scale using Constructal Design. Problem studied here is submitted to two constraints (areas of wave tank and overtopping ramp) and two degrees of freedom: ratio between the height and length of ramp (H1/L1) (or ramp slope, β) and distance between the bottom of wave tank and the device (S). The effect of H1/L1 and S over dimensionless device available power (Pd) is evaluated for three different ramp area fractions (ϕ) and two different monochromatic waves. Conservation equations of mass, momentum and one equation for the transport of water volume fraction are solved with the finite volume method. To tackle with water-air mixture, multiphase model Volume of Fluid is used. Results showed the applicability of Constructal Design for improvement of device performance. For fixed magnitudes of S, the highest magnitudes of Pd are achieved for the lowest possible ratio of H1/L1. For smaller construction areas of the ramp, intermediate magnitudes of S led to the highest magnitudes of Pd, i.e., the sinking of device does not led necessarily to the best performance. Moreover, optimal shapes are not universal (the same) for the two wave conditions studied.
61 citations 61 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.renene.2017.11.061&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - J.C. Martins; M.M. Goulart;
J.C. Martins
Harvested from ORCID Public Data FileJ.C. Martins in OpenAIRE M. das N. Gomes; M. das N. Gomes
Harvested from ORCID Public Data FileM. das N. Gomes in OpenAIRE J.A. Souza; +3 AuthorsJ.A. Souza
Harvested from ORCID Public Data FileJ.A. Souza in OpenAIRE J.C. Martins; M.M. Goulart;J.C. Martins
Harvested from ORCID Public Data FileJ.C. Martins in OpenAIRE M. das N. Gomes; M. das N. Gomes
Harvested from ORCID Public Data FileM. das N. Gomes in OpenAIRE J.A. Souza; J.A. Souza
Harvested from ORCID Public Data FileJ.A. Souza in OpenAIRE L.A.O. Rocha; L.A.O. Rocha
Harvested from ORCID Public Data FileL.A.O. Rocha in OpenAIRE L.A. Isoldi; L.A. Isoldi
Harvested from ORCID Public Data FileL.A. Isoldi in OpenAIRE E.D. dos Santos; E.D. dos Santos
Harvested from ORCID Public Data FileE.D. dos Santos in OpenAIREAbstract Current work aims to study the geometry of an overtopping wave energy converter in real scale using Constructal Design. Problem studied here is submitted to two constraints (areas of wave tank and overtopping ramp) and two degrees of freedom: ratio between the height and length of ramp (H1/L1) (or ramp slope, β) and distance between the bottom of wave tank and the device (S). The effect of H1/L1 and S over dimensionless device available power (Pd) is evaluated for three different ramp area fractions (ϕ) and two different monochromatic waves. Conservation equations of mass, momentum and one equation for the transport of water volume fraction are solved with the finite volume method. To tackle with water-air mixture, multiphase model Volume of Fluid is used. Results showed the applicability of Constructal Design for improvement of device performance. For fixed magnitudes of S, the highest magnitudes of Pd are achieved for the lowest possible ratio of H1/L1. For smaller construction areas of the ramp, intermediate magnitudes of S led to the highest magnitudes of Pd, i.e., the sinking of device does not led necessarily to the best performance. Moreover, optimal shapes are not universal (the same) for the two wave conditions studied.
61 citations 61 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.renene.2017.11.061&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - LORENZINI, Giulio; Da Silva Diaz Estrada, Emanuel;
LORENZINI, Giulio
Harvested from ORCID Public Data FileLORENZINI, Giulio in OpenAIRE Dos Santos, Elizaldo Domingues; Dos Santos, Elizaldo Domingues
Harvested from ORCID Public Data FileDos Santos, Elizaldo Domingues in OpenAIRE Isoldi, Liércio André; +1 AuthorsIsoldi, Liércio André
Harvested from ORCID Public Data FileIsoldi, Liércio André in OpenAIRE LORENZINI, Giulio; Da Silva Diaz Estrada, Emanuel;LORENZINI, Giulio
Harvested from ORCID Public Data FileLORENZINI, Giulio in OpenAIRE Dos Santos, Elizaldo Domingues; Dos Santos, Elizaldo Domingues
Harvested from ORCID Public Data FileDos Santos, Elizaldo Domingues in OpenAIRE Isoldi, Liércio André; Isoldi, Liércio André
Harvested from ORCID Public Data FileIsoldi, Liércio André in OpenAIRE Rocha, Luiz Alberto Oliveira; Rocha, Luiz Alberto Oliveira
Harvested from ORCID Public Data FileRocha, Luiz Alberto Oliveira in OpenAIREAbstract This work applies Constructal design to study numerically the geometry of cavities bathed by a fluid with constant heat transfer coefficient that are intruded into a cylindrical solid body. The objective is to minimize the maximum excess of temperature between the solid body and the ambient by morphing the cavity geometry. Internal heat generating is distributed uniformly into the solid body which has adiabatic conditions on the outer surfaces. The total volume and the volume of the cavities are fixed. The cavities are rectangular with variable aspect ratio. The optimized geometry and performance are reported as functions of the ratio between the volume of the cavities and the total volume, the number of cavities and the dimensionless parameter that accounts for the convective heat transfer, λ . The main results indicate that for fixed number of cavities, ϕ c , and dimensionless parameter λ , there is an optimal number of cavities, N o , that minimizes the maximum excess of temperature and this optimal number of cavities in general increases as ϕ c and λ increases.
24 citations 24 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2014.11.065&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - LORENZINI, Giulio; Da Silva Diaz Estrada, Emanuel;
LORENZINI, Giulio
Harvested from ORCID Public Data FileLORENZINI, Giulio in OpenAIRE Dos Santos, Elizaldo Domingues; Dos Santos, Elizaldo Domingues
Harvested from ORCID Public Data FileDos Santos, Elizaldo Domingues in OpenAIRE Isoldi, Liércio André; +1 AuthorsIsoldi, Liércio André
Harvested from ORCID Public Data FileIsoldi, Liércio André in OpenAIRE LORENZINI, Giulio; Da Silva Diaz Estrada, Emanuel;LORENZINI, Giulio
Harvested from ORCID Public Data FileLORENZINI, Giulio in OpenAIRE Dos Santos, Elizaldo Domingues; Dos Santos, Elizaldo Domingues
Harvested from ORCID Public Data FileDos Santos, Elizaldo Domingues in OpenAIRE Isoldi, Liércio André; Isoldi, Liércio André
Harvested from ORCID Public Data FileIsoldi, Liércio André in OpenAIRE Rocha, Luiz Alberto Oliveira; Rocha, Luiz Alberto Oliveira
Harvested from ORCID Public Data FileRocha, Luiz Alberto Oliveira in OpenAIREAbstract This work applies Constructal design to study numerically the geometry of cavities bathed by a fluid with constant heat transfer coefficient that are intruded into a cylindrical solid body. The objective is to minimize the maximum excess of temperature between the solid body and the ambient by morphing the cavity geometry. Internal heat generating is distributed uniformly into the solid body which has adiabatic conditions on the outer surfaces. The total volume and the volume of the cavities are fixed. The cavities are rectangular with variable aspect ratio. The optimized geometry and performance are reported as functions of the ratio between the volume of the cavities and the total volume, the number of cavities and the dimensionless parameter that accounts for the convective heat transfer, λ . The main results indicate that for fixed number of cavities, ϕ c , and dimensionless parameter λ , there is an optimal number of cavities, N o , that minimizes the maximum excess of temperature and this optimal number of cavities in general increases as ϕ c and λ increases.
24 citations 24 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ijheatmasstransfer.2014.11.065&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Gill Velleda Gonzales;
Gill Velleda Gonzales
Harvested from ORCID Public Data FileGill Velleda Gonzales in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; +2 AuthorsLuiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Gill Velleda Gonzales; Gill Velleda Gonzales
Harvested from ORCID Public Data FileGill Velleda Gonzales in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Antônio José da Silva Neto; Wagner Rambaldi Telles;Antônio José da Silva Neto
Harvested from ORCID Public Data FileAntônio José da Silva Neto in OpenAIREIn this paper it is proposed a comparison between two stochastic methods, Simulated Annealing and Luus-Jaakola algorithms, applied in association with Constructal Design to the geometric optimization of a heat transfer problem. The problem consists in a solid body with an internal uniform heat generation, which is cooled by an intruded cavity that is maintained at a minimal temperature. The other surfaces are kept as adiabatic. The objective is to minimize the maximum excess of temperature (θmax) in the solid domain through geometric optimization of the isothermal double-T shaped cavity. The problem geometry has five degrees of freedom, but in this study four degrees of freedom are evaluated, keeping fixed the ratio H/L (ratio between the height and length of the solid domain) as well as the cavity constraints. The search for the optimal geometry is performed by Simulated Annealing and the Luus-Jaakola algorithm with different configurations or set of main parameters. Each algorithm is executed twenty times and the results for θmax, and corresponding geometry ratios, are recorded. Results of two heuristics are compared in order to select the best method for future studies about the complete optimization of the cavity, as well as, the evaluation of constraints over the thermal performance of the problem. The method employed to compare and rank the different versions of the two algorithms is a statistical tool called multi-comparison of Kruskal-Wallis. With this statistical method it is possible to classify the algorithms in three main groups. Results showed that the Simulated Annealing with hybrid parameters of Cooling Schedule (BoltzExp and ConstExp2) and traditional ones (Exponential) led to the highest probability to find the global optimal shape, while the results obtained with the Luus-Jaakola algorithm reached to several local points of minimum far from the best shape for all versions of the algorithm studied here. However, the Luus-Jaakola algorithm led to the lowest magnitude of maximum excess of temperature, showing that the implementation of hybrid methods of optimization can be an interesting strategy for evaluation of this kind of problem.
7 citations 7 popularity Average influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.4028/www.scientific.net/ddf.370.152&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Gill Velleda Gonzales;
Gill Velleda Gonzales
Harvested from ORCID Public Data FileGill Velleda Gonzales in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; +2 AuthorsLuiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Gill Velleda Gonzales; Gill Velleda Gonzales
Harvested from ORCID Public Data FileGill Velleda Gonzales in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Antônio José da Silva Neto; Wagner Rambaldi Telles;Antônio José da Silva Neto
Harvested from ORCID Public Data FileAntônio José da Silva Neto in OpenAIREIn this paper it is proposed a comparison between two stochastic methods, Simulated Annealing and Luus-Jaakola algorithms, applied in association with Constructal Design to the geometric optimization of a heat transfer problem. The problem consists in a solid body with an internal uniform heat generation, which is cooled by an intruded cavity that is maintained at a minimal temperature. The other surfaces are kept as adiabatic. The objective is to minimize the maximum excess of temperature (θmax) in the solid domain through geometric optimization of the isothermal double-T shaped cavity. The problem geometry has five degrees of freedom, but in this study four degrees of freedom are evaluated, keeping fixed the ratio H/L (ratio between the height and length of the solid domain) as well as the cavity constraints. The search for the optimal geometry is performed by Simulated Annealing and the Luus-Jaakola algorithm with different configurations or set of main parameters. Each algorithm is executed twenty times and the results for θmax, and corresponding geometry ratios, are recorded. Results of two heuristics are compared in order to select the best method for future studies about the complete optimization of the cavity, as well as, the evaluation of constraints over the thermal performance of the problem. The method employed to compare and rank the different versions of the two algorithms is a statistical tool called multi-comparison of Kruskal-Wallis. With this statistical method it is possible to classify the algorithms in three main groups. Results showed that the Simulated Annealing with hybrid parameters of Cooling Schedule (BoltzExp and ConstExp2) and traditional ones (Exponential) led to the highest probability to find the global optimal shape, while the results obtained with the Luus-Jaakola algorithm reached to several local points of minimum far from the best shape for all versions of the algorithm studied here. However, the Luus-Jaakola algorithm led to the lowest magnitude of maximum excess of temperature, showing that the implementation of hybrid methods of optimization can be an interesting strategy for evaluation of this kind of problem.
7 citations 7 popularity Average influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.4028/www.scientific.net/ddf.370.152&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Luiz Alberto Oliveira Rocha;
Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Jairo Valões de Alencar Ramalho; Ruth da Silva Brum; +1 AuthorsLiércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Jairo Valões de Alencar Ramalho; Ruth da Silva Brum; E. D. dos Santos;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE8 citations 8 popularity Top 10% influence Average impulse Average Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1615/interjfluidmechres.v43.i5-6.100&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Luiz Alberto Oliveira Rocha;
Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Jairo Valões de Alencar Ramalho; Ruth da Silva Brum; +1 AuthorsLiércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Jairo Valões de Alencar Ramalho; Ruth da Silva Brum; E. D. dos Santos;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE8 citations 8 popularity Top 10% influence Average impulse Average Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1615/interjfluidmechres.v43.i5-6.100&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Jaifer Corrêa Martins;
Jaifer Corrêa Martins
Harvested from ORCID Public Data FileJaifer Corrêa Martins in OpenAIRE Cristiano Fragassa; Marcelo Moraes Goulart;Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Elizaldo Domingues dos Santos; +3 AuthorsElizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Jaifer Corrêa Martins; Jaifer Corrêa Martins
Harvested from ORCID Public Data FileJaifer Corrêa Martins in OpenAIRE Cristiano Fragassa; Marcelo Moraes Goulart;Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Mateus das Neves Gomes; Luiz Alberto Oliveira Rocha;Mateus das Neves Gomes
Harvested from ORCID Public Data FileMateus das Neves Gomes in OpenAIREA numerical study was performed in the present work about an Overtopping Device Wave Energy Converter (OTD-WEC) with one and two ramps incorporated in a real breakwater. The Constructal Design method was applied to evaluate the effects on the average dimensionless overtopping flow of the degrees of freedom of the device with one and two ramps. In addition, a comparison was carried out among the different geometry configurations of the OTD-WEC to determine which one presents the best hydrodynamic performance. The work used the JONSWAP spectrum and the multiphase Volume of Fluid model. It also solved the conservation equations for mass, momentum, and an equation for the transport of the volume fraction using the Finite Volume Method. Results showed that a device with a two-ramps configuration presented an average dimensionless overtopping flow 6.48% higher than those obtained for the one ramp. Present results obtained using Constructal Design theoretical recommendations about the influence of a complex configuration with four degrees of freedom over the performance of an OTD-WEC integrated into the east breakwater of the city of São José do Norte, State of Rio Grande do Sul (RS), Brazil.
Access Routesgold 19 citations 19 popularity Top 10% influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jmse10040471&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Jaifer Corrêa Martins;
Jaifer Corrêa Martins
Harvested from ORCID Public Data FileJaifer Corrêa Martins in OpenAIRE Cristiano Fragassa; Marcelo Moraes Goulart;Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Elizaldo Domingues dos Santos; +3 AuthorsElizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Jaifer Corrêa Martins; Jaifer Corrêa Martins
Harvested from ORCID Public Data FileJaifer Corrêa Martins in OpenAIRE Cristiano Fragassa; Marcelo Moraes Goulart;Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Mateus das Neves Gomes; Luiz Alberto Oliveira Rocha;Mateus das Neves Gomes
Harvested from ORCID Public Data FileMateus das Neves Gomes in OpenAIREA numerical study was performed in the present work about an Overtopping Device Wave Energy Converter (OTD-WEC) with one and two ramps incorporated in a real breakwater. The Constructal Design method was applied to evaluate the effects on the average dimensionless overtopping flow of the degrees of freedom of the device with one and two ramps. In addition, a comparison was carried out among the different geometry configurations of the OTD-WEC to determine which one presents the best hydrodynamic performance. The work used the JONSWAP spectrum and the multiphase Volume of Fluid model. It also solved the conservation equations for mass, momentum, and an equation for the transport of the volume fraction using the Finite Volume Method. Results showed that a device with a two-ramps configuration presented an average dimensionless overtopping flow 6.48% higher than those obtained for the one ramp. Present results obtained using Constructal Design theoretical recommendations about the influence of a complex configuration with four degrees of freedom over the performance of an OTD-WEC integrated into the east breakwater of the city of São José do Norte, State of Rio Grande do Sul (RS), Brazil.
Access Routesgold 19 citations 19 popularity Top 10% influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jmse10040471&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Elizaldo Domingues dos Santos; Joaquim Vaz;
Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; +1 AuthorsLiércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Elizaldo Domingues dos Santos; Joaquim Vaz;Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Ruth da Silva Brum;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIREAbstract The use of renewable energy sources to improve the thermal conditions of built environments and hence decreasing the consumption of conventional energy is an important aspect to design a sustainable building. Within this context, it is possible to harness the solar energy that reaches the Earth's surface and is stored by the soil as thermal energy. To do so, the Earth-Air Heat Exchanger (EAHE) device can be employed, consisting of a buried duct through which the external ambient air is insufflated. The flowing air exchanges heat with surround soil, and leaves the device with a milder temperature compared to its input temperature. The main goal of this work was to present a new computational modeling to predict the thermal behavior of EAHE. This new numerical model has the advantage of needing a lower computational effort, allowing the study about the influence of operational and constructive parameters, as well as, the application of geometric optimization methods in EAHE. A case study was developed where influence of the installation depth in the thermal potential of an EAHE was investigated. The results are in agreement with those found in literature; however they were obtained with a reduction in processing time of almost 45%.
56 citations 56 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enbuild.2013.05.032&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Elizaldo Domingues dos Santos; Joaquim Vaz;
Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; +1 AuthorsLiércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Elizaldo Domingues dos Santos; Joaquim Vaz;Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Liércio André Isoldi; Ruth da Silva Brum;Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIREAbstract The use of renewable energy sources to improve the thermal conditions of built environments and hence decreasing the consumption of conventional energy is an important aspect to design a sustainable building. Within this context, it is possible to harness the solar energy that reaches the Earth's surface and is stored by the soil as thermal energy. To do so, the Earth-Air Heat Exchanger (EAHE) device can be employed, consisting of a buried duct through which the external ambient air is insufflated. The flowing air exchanges heat with surround soil, and leaves the device with a milder temperature compared to its input temperature. The main goal of this work was to present a new computational modeling to predict the thermal behavior of EAHE. This new numerical model has the advantage of needing a lower computational effort, allowing the study about the influence of operational and constructive parameters, as well as, the application of geometric optimization methods in EAHE. A case study was developed where influence of the installation depth in the thermal potential of an EAHE was investigated. The results are in agreement with those found in literature; however they were obtained with a reduction in processing time of almost 45%.
56 citations 56 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.enbuild.2013.05.032&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Ana Paula Giussani Mocellin;
Ana Paula Giussani Mocellin
Harvested from ORCID Public Data FileAna Paula Giussani Mocellin in OpenAIRE Rafael Pereira Maciel; Rafael Pereira Maciel
Harvested from ORCID Public Data FileRafael Pereira Maciel in OpenAIRE Phelype Haron Oleinik; Phelype Haron Oleinik
Harvested from ORCID Public Data FilePhelype Haron Oleinik in OpenAIRE Elizaldo Domingues dos Santos; +4 AuthorsElizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Ana Paula Giussani Mocellin; Ana Paula Giussani Mocellin
Harvested from ORCID Public Data FileAna Paula Giussani Mocellin in OpenAIRE Rafael Pereira Maciel; Rafael Pereira Maciel
Harvested from ORCID Public Data FileRafael Pereira Maciel in OpenAIRE Phelype Haron Oleinik; Phelype Haron Oleinik
Harvested from ORCID Public Data FilePhelype Haron Oleinik in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Juliana Sartori Ziebell; Juliana Sartori Ziebell
Harvested from ORCID Public Data FileJuliana Sartori Ziebell in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; Bianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIREGiven the increasing global energy demand, the present study aimed to analyze the influence of bathymetry on the generation and propagation of realistic irregular waves and to geometrically optimize a wave energy converter (WEC) device of the oscillating water column (OWC) type. In essence, the OWC WEC can be defined as a partially submerged structure that is open to the sea below the free water surface (hydropneumatic chamber) and connected to a duct that is open to the atmosphere (in which the turbine is installed); its operational principle is based on the compression and decompression of air inside the hydropneumatic chamber due to incident waves, which causes an alternating air flow that drives the turbine and enables electricity generation. The computational fluid dynamics software package Fluent was used to numerically reproduce the OWC WEC according to its operational principles, with a simplification that allowed its available power to be determined, i.e., without considering the turbine. The volume of fluid (VOF) multiphase model was employed to treat the interface between the phases. The WaveMIMO methodology was used to generate realistic irregular waves mimicking those that occur on the coast of Tramandaí, Rio Grande do Sul, Brazil. The constructal design method, along with an exhaustive search technique, was employed. The degree of freedom H1/L (the ratio between the height and length of the hydropneumatic chamber of the OWC) was varied to maximize the available power in the device. The results showed that realistic irregular waves were adequately generated within both wave channels, with and without bathymetry, and that wave propagation in both computational domains was not significantly influenced by the wave channel bathymetry. Regarding the geometric evaluation, the optimal geometry found, H1/Lo = 0.1985, which maximized the available hydropneumatic power, i.e., the one that yielded a power of 25.44 W, was 2.28 times more efficient than the worst case found, which had H1/L = 2.2789.
Access Routesgold 7 citations 7 popularity Top 10% influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jeta1010003&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Ana Paula Giussani Mocellin;
Ana Paula Giussani Mocellin
Harvested from ORCID Public Data FileAna Paula Giussani Mocellin in OpenAIRE Rafael Pereira Maciel; Rafael Pereira Maciel
Harvested from ORCID Public Data FileRafael Pereira Maciel in OpenAIRE Phelype Haron Oleinik; Phelype Haron Oleinik
Harvested from ORCID Public Data FilePhelype Haron Oleinik in OpenAIRE Elizaldo Domingues dos Santos; +4 AuthorsElizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Ana Paula Giussani Mocellin; Ana Paula Giussani Mocellin
Harvested from ORCID Public Data FileAna Paula Giussani Mocellin in OpenAIRE Rafael Pereira Maciel; Rafael Pereira Maciel
Harvested from ORCID Public Data FileRafael Pereira Maciel in OpenAIRE Phelype Haron Oleinik; Phelype Haron Oleinik
Harvested from ORCID Public Data FilePhelype Haron Oleinik in OpenAIRE Elizaldo Domingues dos Santos; Elizaldo Domingues dos Santos
Harvested from ORCID Public Data FileElizaldo Domingues dos Santos in OpenAIRE Luiz Alberto Oliveira Rocha; Luiz Alberto Oliveira Rocha
Harvested from ORCID Public Data FileLuiz Alberto Oliveira Rocha in OpenAIRE Juliana Sartori Ziebell; Juliana Sartori Ziebell
Harvested from ORCID Public Data FileJuliana Sartori Ziebell in OpenAIRE Liércio André Isoldi; Liércio André Isoldi
Harvested from ORCID Public Data FileLiércio André Isoldi in OpenAIRE Bianca Neves Machado; Bianca Neves Machado
Harvested from ORCID Public Data FileBianca Neves Machado in OpenAIREGiven the increasing global energy demand, the present study aimed to analyze the influence of bathymetry on the generation and propagation of realistic irregular waves and to geometrically optimize a wave energy converter (WEC) device of the oscillating water column (OWC) type. In essence, the OWC WEC can be defined as a partially submerged structure that is open to the sea below the free water surface (hydropneumatic chamber) and connected to a duct that is open to the atmosphere (in which the turbine is installed); its operational principle is based on the compression and decompression of air inside the hydropneumatic chamber due to incident waves, which causes an alternating air flow that drives the turbine and enables electricity generation. The computational fluid dynamics software package Fluent was used to numerically reproduce the OWC WEC according to its operational principles, with a simplification that allowed its available power to be determined, i.e., without considering the turbine. The volume of fluid (VOF) multiphase model was employed to treat the interface between the phases. The WaveMIMO methodology was used to generate realistic irregular waves mimicking those that occur on the coast of Tramandaí, Rio Grande do Sul, Brazil. The constructal design method, along with an exhaustive search technique, was employed. The degree of freedom H1/L (the ratio between the height and length of the hydropneumatic chamber of the OWC) was varied to maximize the available power in the device. The results showed that realistic irregular waves were adequately generated within both wave channels, with and without bathymetry, and that wave propagation in both computational domains was not significantly influenced by the wave channel bathymetry. Regarding the geometric evaluation, the optimal geometry found, H1/Lo = 0.1985, which maximized the available hydropneumatic power, i.e., the one that yielded a power of 25.44 W, was 2.28 times more efficient than the worst case found, which had H1/L = 2.2789.
Access Routesgold 7 citations 7 popularity Top 10% influence Average impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/jeta1010003&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Grégori Troina; Marcelo Cunha;
Grégori Troina
Harvested from ORCID Public Data FileGrégori Troina in OpenAIRE Vinícius Pinto; Vinícius Pinto
Harvested from ORCID Public Data FileVinícius Pinto in OpenAIRE Luiz Rocha; +3 AuthorsLuiz Rocha
Harvested from ORCID Public Data FileLuiz Rocha in OpenAIRE Grégori Troina; Marcelo Cunha;Grégori Troina
Harvested from ORCID Public Data FileGrégori Troina in OpenAIRE Vinícius Pinto; Vinícius Pinto
Harvested from ORCID Public Data FileVinícius Pinto in OpenAIRE Luiz Rocha; Luiz Rocha
Harvested from ORCID Public Data FileLuiz Rocha in OpenAIRE Elizaldo dos Santos; Elizaldo dos Santos
Harvested from ORCID Public Data FileElizaldo dos Santos in OpenAIRE Cristiano Fragassa; Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Liércio Isoldi; Liércio Isoldi
Harvested from ORCID Public Data FileLiércio Isoldi in OpenAIREStiffened thin steel plates are structures widely employed in aeronautical, civil, naval, and offshore engineering. Considering a practical application where a transverse uniform load acts on a simply supported stiffened steel plate, an approach associating computational modeling, Constructal Design method, and Exhaustive Search technique was employed aiming to minimize the central deflections of these plates. To do so, a non-stiffened plate was adopted as reference from which all studied stiffened plate’s geometries were originated by the transformation of a certain amount of steel of its thickness into longitudinal and transverse stiffeners. Different values for the stiffeners volume fraction (φ) were analyzed, representing the ratio between the volume of the stiffeners’ material and the total volume of the reference plate. Besides, the number of longitudinal (Nls) and transverse (Nts) stiffeners and the aspect ratio of stiffeners shape (hs/ts, being hs and ts, respectively, the height and thickness of stiffeners) were considered as degrees of freedom. The optimized plates were determined for all studied φ values and showed a deflection reduction of over 90% in comparison with the reference plate. Lastly, the influence of the φ parameter regarding the optimized plates was evaluated defining a configuration with the best structural performance among all analyzed cases.
Access RoutesGreen gold 13 citations 13 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.<script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/met10020220&type=result"></script>'); --> </script>For further information contact us at helpdesk@openaire.eu - Grégori Troina; Marcelo Cunha;
Grégori Troina
Harvested from ORCID Public Data FileGrégori Troina in OpenAIRE Vinícius Pinto; Vinícius Pinto
Harvested from ORCID Public Data FileVinícius Pinto in OpenAIRE Luiz Rocha; +3 AuthorsLuiz Rocha
Harvested from ORCID Public Data FileLuiz Rocha in OpenAIRE Grégori Troina; Marcelo Cunha;Grégori Troina
Harvested from ORCID Public Data FileGrégori Troina in OpenAIRE Vinícius Pinto; Vinícius Pinto
Harvested from ORCID Public Data FileVinícius Pinto in OpenAIRE Luiz Rocha; Luiz Rocha
Harvested from ORCID Public Data FileLuiz Rocha in OpenAIRE Elizaldo dos Santos; Elizaldo dos Santos
Harvested from ORCID Public Data FileElizaldo dos Santos in OpenAIRE Cristiano Fragassa; Cristiano Fragassa
Harvested from ORCID Public Data FileCristiano Fragassa in OpenAIRE Liércio Isoldi; Liércio Isoldi
Harvested from ORCID Public Data FileLiércio Isoldi in OpenAIREStiffened thin steel plates are structures widely employed in aeronautical, civil, naval, and offshore engineering. Considering a practical application where a transverse uniform load acts on a simply supported stiffened steel plate, an approach associating computational modeling, Constructal Design method, and Exhaustive Search technique was employed aiming to minimize the central deflections of these plates. To do so, a non-stiffened plate was adopted as reference from which all studied stiffened plate’s geometries were originated by the transformation of a certain amount of steel of its thickness into longitudinal and transverse stiffeners. Different values for the stiffeners volume fraction (φ) were analyzed, representing the ratio between the volume of the stiffeners’ material and the total volume of the reference plate. Besides, the number of longitudinal (Nls) and transverse (Nts) stiffeners and the aspect ratio of stiffeners shape (hs/ts, being hs and ts, respectively, the height and thickness of stiffeners) were considered as degrees of freedom. The optimized plates were determined for all studied φ values and showed a deflection reduction of over 90% in comparison with the reference plate. Lastly, the influence of the φ parameter regarding the optimized plates was evaluated defining a configuration with the best structural performance among all analyzed cases.
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