[natantyt]

Hi

I 'm trying to model a catalytic gas reactor, the outlet condition must ensure zero concentration gradient and temperature gradient at the outlet. The options in Fluent are outflow which consider these conditions but is not suitable for compressible flow. the other is the outlet pressure for compressible flow but I don't know the back flow temperature ,species fraction at the outlet as I want to find them. what is the correct boundary condition for this problem in Fluent.

Thanks