[CFD_SG_01]

Hello everybody,

I need your support to solve a challenging situation I face with rhoSimpleFoam solver.

I'd like to compare results between StarCCM+ and OpenFOAM for a simple air manifold case.

Both runs with SIMPLE solver using compressible and similar settings.

It perfectly runs with STARCCM+ but it quickly stops (after 6 iterations) with OpenFOAM 2312.

The key facts are:

->The OpenFoam case works only if I set the solver SIMPLEC. This leads to different results between StarCCM+ and OpenFOAM. As soon as the consistent option is deactivated the solver crashes.

->Mesh has been checked

->If I reduce by 70% the inlet massflowrate it works but if I set a ramp the computation crashes when reaching 50% of the targeted massflowrate.

-> I've also tried to play with under relaxation coefficient without any success

Before I eventually share some setting information. Do you have any ideas of what could be the reasons of such issue?

Thank you in advance for your help