modeling Wall as pressure holder
 

Hello,

I want to model a pressure chamber in an very easy way (without sliding or dynamic meshes).

In order to do this I would prefer to use a wall of the chamber as plumper. This plumper should give the fluid a pressure condition.

I used the pressure in/outlet condition in former settings, but this is connected to mass flows in or out my pressure chamber.

Has someone an idea how to model a fixrd wall this way? As an solid fluent could have problems with such a condition.