Seyyed Mahmoud Mousavi
Subscriber

1- The dynamic mesh settings are Smoothing and Remeshing:

2- I can change the "Ramping" on System Coupling from None to Linear to Minimum Iterations. However, it changed to a yellow field with a question mark close to the Data Transfer icon (such that something is incomplete). 

3- I have tried Under relaxation up to 0.35. But it could not help me to get a converged solution.