[bojiezhang]

hello every former:

I use interDyMFOAM with moving mesh(displacementLaplacian), and I use the pointDisplacement to control the boundary motion.

when I set a small displacement for one boundary, at the first time step, all is ok and the internal mesh move formally.

but at the second time step, I find the mesh on the boundary distorted, and the internal mesh certainly also distorted. At the same time, the courant number become very large and the caculation terminated.

I feel confused if the displacementLaplacian is credible, for it can not be applied for such a small displacement.

Hope someone could tell me if I did something wrong.

Thank you!

bojiezhang