(moved from FSI with interFoam and CalculiX)
I am trying to solve the divergence issue with
interFoam and CalculiX.
(FSI Flap case modified for
I modified a few things with the OpenFoam settings and increased the time it takes for the simulation to diverge.
Initially ‘interFoam’ diverged way before the falling water column hit the flap.
But after these modifications, as soon as the water column hits the flap it diverges rapidly.
I have tried both, explicit and implicit coupling as well to try and increase the time at which the solution diverges, but no help as implicit diverges before explicit. (As per my understanding implicit should be comparably more stable than explicit)
Fluid_interFoam_explicit.log (119.3 KB)
Fluid_implicit_lastParts.log (78.6 KB)
Here, I tried reducing the water column size, but there is a similar results as above.
Any hints, advice are very welcome.
I am using the following settings in
maxCo 2; maxAlphaCo 1; nAlphaSubCycles=5; maxDeltaT 1;