Reply To: Pitching airfoil using overset and dynamic mesh.

[nahian.masud]

hi, I tried using multiple things. Actuallly it is a hydrofoil and fluid is water. I  used transient profile fucntion as udf. for the moving fluid zone, I defined 1 udf for pitching and another udf for heaving. for the heaving udf, I used the lift.out file to get the lift force, which is used to get the transitional velocity. 

The problem I am facing is that, the system is diverging even after I  start the simulation after the flow field is stabelized. The lift goes high positive and in the next timestep it goes very high negetive value. and keeps going on and it gives a divergence error. 

I set the reference values for water and velocity inlet. Do you have any idea how I can fix this?

note that i did check the mesh and did all the modifications possible for the overset interface.