Type of solver and convergence problem
I'm trying to validate the RANS solver by doing a simple NACA0012 airfoil in a transonic flow. This case is different from the tutorial because i'm using a mesh with boundary layer and I'm also using Spalart-Almaras model. The mesh is provided by the NASA and theoretically, convergence should be ideal.
Here my questions:
1) What type of solver Caedium is using when the option "Compressible flow" is turned on? It is a compressible scheme (rhoCentralFoam) or it still based on the pressure ?
2) Is there a trick to help convergence ? Even in linear upwind scheme with relaxation factors reduced at minimum, I'm still diverging after 1400 iterations. Before the divergence, cp curve looks good but it diverge anyway.
3) Where can I found the info correlating Caedium and openfoam, i.e. that the function I turn "on" in Caedium is equal to a specific command line in openfoam.