[raven]

Hello,

I'm working on a 2D airfoil simulation with a rotating mesh within a C-grid. Inside a regular C-grid, there is a circular region that rotates independently thereby changing the angle of attack. The circular region is a cyclicAMI type AMI patch.

When I run the simulation using pimpleDyMFoam with a fixed timestep of 1e-6, the Courant number simply blows up (1e32) and the simulation crashes. A timestep of 1e-6 worked well with the same mesh only without the AMI interface. At first I thought that it was the rotating motion of the circular mesh that caused the Courant number to blow up but same thing happened even when the angular velocity was set to zero.

In another thread, I saw someone mention that creating baffles can help with that. I saw createBaffleDict in some dynamic mesh tutorials as well. But I'm not sure what this does exactly. Does anyone have any insight or advice on this matter?

Thank you.