Computational methods of the advanced fluid dynamics model
Computational methods of the advanced fluid dynamics model
To more accurately treat severe accidents in fast reactors, a program has been set up to investigate new computational models and approaches. The product of this effort is a computer code, the Advanced Fluid Dynamics Model (AFDM). This paper describes some of the basic features of the numerical algorithm used in AFDM. Aspects receiving particular emphasis are the fractional-step method of time integration, the semi-implicit pressure iteration, the virtual mass inertial terms, the use of three velocity fields, higher order differencing, convection of interfacial area with source and sink terms, multicomponent diffusion processes in heat and mass transfer, the SESAME equation of state, and vectorized programming. A calculated comparison with an isothermal tetralin/ammonia experiment is performed. We conclude that significant improvements are possible in reliably calculating the progression of severe accidents with further development.
- University of North Texas United States
- University of North Texas United States
- Karlsruhe Institute of Technology Germany
ddc:620, Equations, Vector Processing, Hydraulics, 990220 -- Computers, Multiphase Flow, Fluid Mechanics, 21 Specific Nuclear Reactors And Associated Plants, Breeding, Mechanics, Simulation 220900* -- Nuclear Reactor Technology-- Reactor Safety, Reactor Accidents, Equations Of State, Fbr Type Reactors, Lmfbr Type Reactors, 42 Engineering, Mass Transfer, Fluid Flow, Computerized Simulation, Engineering & allied operations, Calculation Methods, 22 General Studies Of Nuclear Reactors, Computer Codes, Computers, Breeder Reactors, Computing, 420400 -- Engineering-- Heat Transfer & Fluid Flow, Heat Transfer, Reactors, Cray Computers, 99 General And Miscellaneous//Mathematics, 210500 -- Power Reactors, 620, Energy Transfer, Fast Reactors, & Computer Programs-- (1987-1989), Accidents, Epithermal Reactors, And Information Science, Programming, A Codes, Iterative Methods, Computerized Models, info:eu-repo/classification/ddc/620, Liquid Metal Cooled Reactors
ddc:620, Equations, Vector Processing, Hydraulics, 990220 -- Computers, Multiphase Flow, Fluid Mechanics, 21 Specific Nuclear Reactors And Associated Plants, Breeding, Mechanics, Simulation 220900* -- Nuclear Reactor Technology-- Reactor Safety, Reactor Accidents, Equations Of State, Fbr Type Reactors, Lmfbr Type Reactors, 42 Engineering, Mass Transfer, Fluid Flow, Computerized Simulation, Engineering & allied operations, Calculation Methods, 22 General Studies Of Nuclear Reactors, Computer Codes, Computers, Breeder Reactors, Computing, 420400 -- Engineering-- Heat Transfer & Fluid Flow, Heat Transfer, Reactors, Cray Computers, 99 General And Miscellaneous//Mathematics, 210500 -- Power Reactors, 620, Energy Transfer, Fast Reactors, & Computer Programs-- (1987-1989), Accidents, Epithermal Reactors, And Information Science, Programming, A Codes, Iterative Methods, Computerized Models, info:eu-repo/classification/ddc/620, Liquid Metal Cooled Reactors
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