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Under relaxation factors and its effect on turbulent viscosity ratio |
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New Member
Peetak Mitra
Join Date: Jul 2012
Posts: 19
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Hi,
I am using ANSYS fluent to run a simulation of flow characteristics inside a pump sump. Now there was a case, in which I was getting the error, Turbulent Viscosity ratio limited to 1+e5. Now I saw the zones which had issues wrt high Turbulence viscosity ratio, and remeshed them and brought the max skewness to less than 0.85 which is acceptable standards I guess. And it worked as the warning went away, but after like 3000 odd iterations, the solution blows out again. I changed the Under-relax factors, and now the solution seems to be converging well. But I just want to know if this is the correct approach for redressing an issue such as this. And what are my other alternatives? Is wall y pluses a cause of concern for me? Thanks, Peetak |
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Tags |
under relaxation factors, viscosity ratio, y plus |
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