Grid refinement with wall functions

Mark Render

Hello,

when you refine a grid systematically (a factor of 8 in 3D at every stage) you will obtain a grid independent result after sufficient refinement stages. In other words the differences in results between two grids will decrease while increasing grid refinement. So now my question. Does this hold for using standard k-eps model with wall function ? Every time you refine the grid you will get a different b.c. at the wall due the the log-law, won't you ? So is it right, that you can't expect a classical grid convengence in that case ? (In addition you are restricted in your systematcal refinement due to the y+ value)

Please give some comments on that.

Mark