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,

hello,

You could try "skewCorrected" instead of upwind.

regards,
olivier