LINK OF THE PROJECT: https://www.simscale.com/workbench/?pid=622516419259523012&mi=run%3A395%2Csimulation%3A331&mt=SIMULATION_RUN
Actual simulation: Compressible 9
SUMMARY: I’m simulating a transient analysis about an Intake manifold for an internal combustion engine, It has a turbocharger so the mass flow parameter it’s high, I established the pressure pulse in excel with the RPM but my issues are:

The numerics, I’m trying to make a cost effective analysis, but I tried to set up the relaxation factors for fast convergence, but I have issues with the solvers and the schemes I don’t know which ones I have to use for my analysis.

The simulation control, I tried with adjustable time step: false, but I identified high courant number, in transient test 14. Also, I tried an adjustable time step: true with a courant number of 0.7 but It’s too slow.

Using a herparametric mesh with a level of refinement of 1, I tried a simulation with a level of refinement of 2 but the simulation crashed.
Best regards, I will appreciate your help.