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May 11, 2020, 06:49 |
Steady State Multiphase Simulation
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#1 |
Member
Mike Worth
Join Date: Jun 2019
Posts: 45
Rep Power: 6 |
I'm trying to simulate some flow where the geometry is quite different, but the physics is pretty similar to the capillaryRise tutorial. I'm using the interIsoFoam solver in v1912.
I'm after a steady-state solution, but am suffering from oscillations driven by the initial energy in the system. As far as I can tell, the tutorial case suffers from the same issue. Is there a way to damp the solution or similar to remove this 'sloshing energy' so that the solution tends towards the minimum energy (steady state) condition? I've tried adding velocityDampingConstraint to my fvOptions file, (which is being read as it gives errors if misspelled), but I don't actually see the velocity being limited. This isn't an ideal way to make my simulation work, but would at least enable me to get an initial 'sloshing-free' surface driven condition. I find it odd that there don't seem to be any steady-state multiphase solvers. Is this because there is a workaround where (for example) the fvSolution can be adjusted to give pseudo-steady-state without requiring a duplicate solver? Many thanks, Mike |
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