Backflow into inlets with multiple inlets
Posted May 14, 2019, 3:09 PM EDT Fluid, Computational Fluid Dynamics (CFD) Version 5.4 3 Replies
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I am simulating laminar flow through a thin geometry with two inputs on one side and one outlet on the other side (see image for the geometry). When initializing the inputs via velocities I get the expected results - see the corresponding image (the upper inlet has 10x the velocity of the one below). But with pressure as inputs, the simulation results in a (back)flow between the two inputs.
Obviously I enabled "suppress backflow" for both inlets but this only seems to account for the "own" input and not the other one. I tried to add weak constraints but these can only be applied to a volume. Is there an option to define equations on a surface?
An option I found is to take fans as input and output but these require pressure curves and the system will not be fan-driven.
I also added the MPH file.
best regards Claus