Total pressure compressible flow
 

hello all,
I am working on scramjet inlet
i want total pressure recovery
so when we calculated total pressure results from fluent and OpenFoam are very different.
rest pressure(static),density,MachNO.velocity matches well.

fluent uses formula
Pt = Po *(1+ (kappa-1)*M^2 /2)^(kappa/kappa-1)

for openFoam i used postProcess utility totalPressureCompressible
results are not matching up
can u guys help

That is because OpenFOAM uses:


which should equal the Fluent value only in isentropic flow conditions.

You can find some explanation on the funtionObjects in the cpp source guide

I would suggest to use a ParaView calculator to use the same formulation as Fluent.

Regards,
Tom