I am looking for help with conjugate heat transfer case.
My case diverges although I have already meshed with nearly fine settings, with refinements near sharp objects. Also Settings are pretty straight forward as I only added natural convection inlet/outlet to air box and heat generation on one of the elements. All interfaces are predefined by simulation as “Coupled inteface thermal”. Lack of divergence might be also connected with solver settings and relaxation factors.
I will be glad for any guidance.
These 3 metrics are very critical to obtain a successful simulation. Unfortunately, there’s no solution that works for all cases here. Sometimes it may take some CAD changes, sometimes you can solve it by adding refinement.
Please inspect the mesh using the mesh quality feature (section 2 of the article) and spot where the bad cells are. They will most likely be located around these regions:
The two faces approach in an asymptotic fashion. The small cells that capture this sharp corner tend to have a very low quality. These regions will definitely take some tweaks (most likely CAD-related, for your specific case) before you can get a good enough mesh for a simulation.