[PYJG]

Hi,

I am working on a high speed flow with shock waves. The flow is turbulent and reaches mach 1 as it reaches the mouth if the expansion region.
I have a steady state solution for the fluid region in the model. Next step is introducing the solid boundary to this fluid region. The interaction is transient. I want to run this model for first 30 seconds. I used time steps of the order of 10^-6 to obtain the steady state solution. I want to efficiently but accurately model the phenomena occurring in the solid region.
a) are there any tips for setting up time steps in transient analysis.If I were to use the same time step as steady state it would take a lot of time.
b)will reducing the mesh size and increasing the time steps help?
So far I have used-
- total time 30 sec, adaptive meshing and tried different minimum time 10e-4, 10e-5, 10e-6 and #of loops are 7
-time steps 0.01 I get Finmes error

I am using high speed model and also introduced laminar to turbulent smoothness factor of 0.1. Please help