how to maintain constant presure in a tank?

JB

Hello everyone,

I'm modelling the rise in temperature of a 'sealed' air tank, from 300K to 450K, over about 20 minutes.

In reality, the tank is not 100% sealed, but according to theoretical calculations, the velocity magnitude through the leakage zone is very small compared to the rest of the tank (flow driven by free convection).

Is there a simple way to account for the leakage without geometrically representing the leakage zones? (i.e. pressure remains constant in the tank, even if the temperature increases and the tank is 'sealed'.) A mass sink maybe? any successful experience?

Thanks for your input. /JB