[fluidmechanics]

Dear All;

I am going to perform pitching-plunging airfoil using Fluent. I have read related posts here. I am using CG motion. My questions are:

1- For pitching and plunging motion, is it true to rotate and translate all domain rigidly and no need to remesh? Doing so, there will be some velocity induced by motion in all cells of CFD domain, which seems not logic.

2- When creating a dynamic zone, where must be defined and assigned udf to? airfoil or domain or both?

Thanks in advance.