Question abt Overset & ALE

Ben

Hi ppl,

I have some question regarding Overset & ALE (Arbitrary Lagrangianâ€"Eulerian).

If one needs to simulate a cylinder moving in a fluid, he can use the ALE formulation of the NS eqns to move or deform the whole grid to acheive this.

If he's using overset, where there are now 2 grids - one for cylinder, usually structured and one for background, usually cartesian, what and how should the eqns be solved? Is it the ALE formualation for the cylinder grid, ie with a moving mesh velocity (same as above), and the original non-ALE formulation for the background stationary carteisn grid?

Will there be problems at the interface of the 2 grids since they'r using differnt formulations?

thanks