Fig. 11. Comparison of the time averaged tangential and axial velo city between the LDA measurements, Hoekstra [65] and the current Reynolds stress model (RSM) results at z=94.25 cm from cyclone bottom. From left to right tangential velocity and axial velocity, Dx/D=0.5. the published article, by mistake, the right hand and left hand figures are identical. The comments and analysis based on the figure are unchanged. The publisher would like to apologise for any inconvenience this may have caused to the authors of this article and readers of the journal.