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-   -   Courant Number Increases Rapidly (http://www.cfd-online.com/Forums/openfoam/115370-courant-number-increases-rapidly.html)

najunaju March 29, 2013 06:06

Courant Number Increases Rapidly
 
I am using kwsst turbulence model, I run some simulations with mesh, it had max mesh skewness 1.8E-08. These simulations converged very well and courant number was 0.5 throughout the case.

But when the same settings I run with a mesh whose max mesh skewness is 3.5 the cournat number increases gradually and reaches a very high value.

I am using Gauss Upwind schemes. Does any body knows is this the effect of skewness? if so What schemes I may use to get converged simulation.

Any kinds of help will be highly appreciable.

Best,

olivierG April 2, 2013 05:47

hello,

You could try "skewCorrected" instead of upwind.

regards,
olivier


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