HELP simulation not converging
Hi everyone,
I’m working on a CFD simulation of flow inside a pipe containing a TPMS structure. I think the mesh is reasonably good: mesh diagnostics do not show major issues, and I only have around 50 problematic cells out of ~8 million total cells. Considering the complexity of the geometry, I assume that should be acceptable.
Right now I’m trying to first solve the case using the k-epsilon model to reach convergence, because with k-omega the residuals remain high and do not decrease properly.
Am I approaching this the wrong way? What should I check next?
Could the issue be related to boundary conditions, near-wall treatment, mesh quality in critical regions, relaxation factors, or something else?
Any advice or suggestions would be really appreciated.