I have been contacted by a co-worker to ask about the boundary condition capabilities of Fluent. Is it possible to define a pressure boundary condition that varies with time. Say for example if a fluid is being pumped into and out of a chamber, and the forcing function varies either as a square wave or sinusoidally. Is there any possiblity of Fluent being able to analyze this type of problem? Any hints would be greatly appreciated.

Hi Rob,

The answer is yes. You can use time varying boundary condition in Fluent. However, you have to use User Defined Funcitions (UDF) to simulate such a boundary condition. There is one UDF example containing time varying pressure boundary condition in Fluent 6.0 tutorials.(Internal compressible flow in a nozzle)

Good Luck