I’m simulating a fsi problem using openfoam-precice adapter. The simulation runs successfully at first. However, after some while the simulation diverse suddenly. The simulation converges within 3 iterations in the previous time step (in file: precice-Calculix-iterations). Then at the last time step, the maximum iteration 200 is reached and stops the simulation. The maximum strain is around 1.6-2.2. Does anyone know this type of error? Is this caused by the large strain?
I checked the CFD mesh in the final step, there’s no problem. The deformation is acceptable. I also ramped the force to avoid it in one shot, but it doesn’t work.