flat plate boundary layer problem --great influence of viscosity
 

Dear everyone:

It seems that there is a convergence problem with this case, k and epsilon were not convergent finally(because the RelTol set is 0.1?). And are you sure the BC. of U on top patch is proper set to fixedValue ? Anyway, it's a interesting but strange case, hope someone give me a bright hint.

Best,
LJ

.:confused:

:confused:

And also fine in CFX

Again the result of Fluent as before is not clear.

and it seems not the problem of turbulence model and wall function as i have turn off the turblence model by using laminar,This strange sensitive phenomenont will also happpened

thanks

what is your numerical boundary condition for your up patch in the poor case? It seems that it is a fixed value. Have you tried zerogradient or sym boundary condition for this patch?

regards, Junwei