Pressure tank simulation
 

Does anyone das experience with pressure tank simulation? Problem is that it is closed area with no outlet and inlet. There is time dependable temperature boundary condition on the boundary of the tank. That means that encreasing temperature should encrease pressure inside the tank. Initial pressure of the fluid is 15 MPa. I tried to use time dependable model in Fluent 4.5 but it wrote me something like: "mass imbalance using outlet" while calculating.

Re: Pressure tank simulation
 

Use "density function of pressure", mass flux inlet and "Floating operating pressure"

i have the same problem. have to simulate a pressure tank in fluent with no inlet and outlet. just has temperature boundary conditions.
i want to study the effect of temperature difference along day on the pressure distribution.
please help me guys.whats your suggestion??