[inginer]

Hello,

I'm trying to do my first case in OF. I converted a mesh from fluent, an airfoil 2D, compressible flow with M=0.8, Spalart-Allmaras imposed and a Courant Numner=200 in fluent. I adapt an compressible case from tutorials of OF, /sonicFoam/RAS/naca. I can see the mesh without any problems, but I don't know how can I calculate the time step, delta t from /system/controlDict.

The second problem regards the thermophysicalProperties definition. I read the tutorial but when i started to write my thermophysicalPropoperties i got stuck; I have sutherland law imposed and perfect gas; how can i calculate all the coefficients to have a good thermoProp correct?

Thk,

Best Regards,
Ovidiu