interFoam Stability Issues
I am trying to simulate an outlet chamber using interFoam but no matter what combination of boundary conditions I choose - I seem to run into a stability issue after a varied amount of time into the simulation.
InterFoam decreases the time step continually until a floating point error occurs. I have based the case set up on the waterChannel tutorial file - but i have tried numerous alternative configurations of boundary conditions and not yet found anything that actually works. The mesh was constructed using Salome and represents a fairly simple situation where two pumped high velocity inlets enter a small outlet chamber, the chamber is equipped with two simple gravity outlet pipes. I have included a drop box link to the case files below. https://www.dropbox.com/sh/m06gbu64j...aBwSqGcfa?dl=0 If anyone out there can shed any light on this - it would make my year. Thanks |
1) You mesh have some non-ortho faces, but you have no correctors in your fvSolution: "nNonOrthogonalCorrectors 0;"
2) It seems that you initial time step is too big, try to reduce it 3) Always check your mesh with checkMesh. In the output have to be no-errors or warnings. |
Stability Issues
I have tried increasing the number of orthoCorrectors and this helps the simulation limp on a little further.
But I still get the same problem little later in the process. I have tried adusting the max Courant number and the tolerance in the Fvsolution file - but none of this actually seems enough to push this over the edge and develop a stable solution. Anyone got any other ideas ? |
Try to simulate with "adjustTimeStep no" and small value of deltaT.
Adjusting of the time step in some situation may not work correctly. |
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