Dear fellow researchers,
I have a momentum source which is dependant on a volume fraction gradient in a transient multiphase simulation. However I want it to "to add" up into regions were the gradient is not yet developed. For this I would need the momentum source values to integrate along the flow direction, starting from my inlet. One could think of it as a kind of hydrostatic pressure, when the flow is directed towards gravity. The momentum source needs to be calculated for each timestep, so a fixed expression is no sufficient solution for my problem. I can't seem to find a way using the standard expression language in ANSYS CFX. Is there some kind of way to implement this idea?
Kind regards,
Thomas