Problem diverges when mesh deforms with dynamicMesh
 

Hi,

I'm trying to model a rotating aileron on a wing thru displacementLaplacian with:

motionSolverLibs ("libfvMotionSolvers.so");

motionSolver displacementLaplacian;

diffusivity quadratic inverseDistance 1 (wing_aileron_left);

I need to run for 0.5s but the simulation diverges around 0.22s.

Now I'm reducing my CFL from 0.5 to 0.2. What else can I do? My original mesh was generated using snappyHexMesh but the mesh quality was acceptable. I also tried displacementSBRStress but the divergence happened even much earlier.