Ahmed Shayor

Thank you for the co-operation. I do know that. My question was not about "how" but what happens if I do the above mentioned operation?In my particular case I don't want any "solid"  walls to deform but just the case where the fluid volume walls deform . Are they deforming when the solver is running ( as just Fluent with no coupling ) as they should since I chose and assigned the "walls" Boundary as having "Dynamic Mesh" with the forces on it from the internal fluid volume( just inside the "walls" surface. So just like a tube it should bulge when fluid is flowing through it. However is that happening and I cannot see it? Or does Dynamic Mesh does not work in this case and ignored when solving?