[soundglider]

Hi Foamers,

I'm looking for a suited BC to model a mass flow controlled fan. I didn't find a suited cyclic/fan BC, these are pressure jump BCs. What I need is fixed velocity value at inlet and outlet (variable pressure ratio), for simple/(and optional pimple) solvers.

I thought about using a normal velocity fixed value inlet bc for the fan outlet, and implementing a mass flow outlet BC, which adapts the static pressure according to a preliminary set mass flow. I need this for OF2.3.

I found something about a massFlowOutlet-BC implemented by iconcfd for OF1.6, but no details or source code.

Do you have any idea where to start and how to implement this? Or do you even know of a solution without implementing it all by myself? Though I have used OpenFOAM in different projects, I'm new to OF programming.

Thanks in advance,
Sebastian

[soundglider]

This seems to work good enough for the moment:
On the outlet I'm using a flowRateInletVelocity with a negative flowRate value, on the inlet a fixedValue velocity. For stabilization / well-posedness I place an additional fixedValue static pressure outlet somewhere, but also without it worked when setting the RefCell in fvSolution.