How can i calcul the moment

Lavastre jeremie

Hello,

I'm a french student in Hydraulics et I have a problem of CFD. I carry out a unsteady, ideal gaz, turbulence, segregated calculation. In fact,I'm pumping a gas into a tank and the flow which enters has a low mach. So, I use the floating operating pressure to avoid roundoff errors. My aim is to calculate the moment exerted by gas on a wall of the tank. Fluent calculates this moment from static pressure which is a relative pressure. Me I want the absolute pression moment.We have Absolute pressure= static pressure+ floating operating pressure.

So, how could I manage to this good moment value?

Cordially