|February 19, 2003, 12:22||
MULTIGRID at the wall
After reading a few archived messages on this site it seems that people are still having problems with getting CFD with multigrids to work accurately in the region of turbulent boundary layers.
I am also having problems with getting my multigrid to work accurately near the wall (FVM, structured grid with RANS k - omega turbulence model)
The problems are with what boundary conditions to specify on the coarsegrids at the wall (which fall in log layer).
my questions are therefore:
* does anybody know of any references (papers, thesis, etc...) about successful simulation of turbulent flows using multigrid methods with wall-laws and RANS?
* if you use multigrid and wall-laws do you need to use the wall-laws on ALL levels or can you just use them on the most coarse grids?
* which multigrid methods are good/bad when simulating fluid flow in turbulent boundary layers?
* is there anyone out there that has had similar problems and would like to share their experiences of how they sucessfully implemented a multigrid method using wall-laws for the most coarse levels?
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