[student2008]

Hi everyone,
for two month I occupy with cfd (fluent). So I have less experience in using fluent. I have to model flow through porous media. I struggle with bad convergence behavior of continuity. While the other residuals converge, continuity stays constant at round about 0.01. I read a lot about the continuity convergence behavior and similar problems, but I don’t found any helpful advice. The net difference of the mass flow rate in inlet and outlet is much less than 0.5%, but I do not know whether the solution is correct. Here some facts about my problem.
- Tetra mesh
- Acceptable mesh metrics
- Cells: 7 million
- Pressure based solver, steady
- Standard k-epsilon
- Porous media model
- One mass flow inlet, one pressure outlet
- Coupled scheme + pseudo transient option
I tried varying solution controls for pressure and momentum, but it does not help. Also using the simplec scheme does not help. Does somebody have an advice? Thank you very much.