OmegaWallFunction fails

giammy92 · May 5, 2016, 14:39

Hi Foamers,
I have performed a simulation on a mesh with y+<1 with k-omega SST. I have before tried with OmegaWallFunction and my results were wrong according experimental data.After i have tried with fixedValue 1e7 and i have achieved good results of force coefficients. How do you explain this?

giammy92 · May 5, 2016, 17:39

My other turbulent bc at wall are:
K 1e-12
Nut calculated

Maybe to have good results with omegaWallFunction i have to set NutUSpaldingWall?

chpjz0391 · May 10, 2016, 05:30

Quote:

Originally Posted by giammy92

My other turbulent bc at wall are:
K 1e-12
Nut calculated

Maybe to have good results with omegaWallFunction i have to set NutUSpaldingWall?

could you post the error notice of ur simulation?

giammy92 · May 10, 2016, 07:10

sorry maybe i'm not explained well. OmegaWallFunction doesn't fails in sense that not runs but in sense that i have more accurate results when i use omega fixedValue 1e7.

May 5, 2016, 14:39	OmegaWallFunction fails	#1
giammy92 Senior Member Join Date: Mar 2016 Posts: 133 Rep Power: 10	Hi Foamers, I have performed a simulation on a mesh with y+<1 with k-omega SST. I have before tried with OmegaWallFunction and my results were wrong according experimental data.After i have tried with fixedValue 1e7 and i have achieved good results of force coefficients. How do you explain this?

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May 5, 2016, 17:39		#2
giammy92 Senior Member Join Date: Mar 2016 Posts: 133 Rep Power: 10	My other turbulent bc at wall are: K 1e-12 Nut calculated Maybe to have good results with omegaWallFunction i have to set NutUSpaldingWall?

May 10, 2016, 07:10		#4
giammy92 Senior Member Join Date: Mar 2016 Posts: 133 Rep Power: 10	sorry maybe i'm not explained well. OmegaWallFunction doesn't fails in sense that not runs but in sense that i have more accurate results when i use omega fixedValue 1e7.