Overset mesh for Fluid Structure Interaction in OpenFOAM
 

Hello everybody.

I want to use overset mesh for fluid structure interaction like those in the third figure of the attached picture below.


I think Official OF1706 or OF1712 do not have fluid structure interaction facilities like fsiFoam available for foam-extend 3.2 or 4.0. Thus, I think it is better to use overset mesh with foam-extend.

I asked Prof. Hrvoje Jasak for overset code in Foam-Extend. He kindly provided me with Foam-Extend 4.1 code (It is not officially released yet. But you can email to Prof. Jasak if you want to try).

But as far as I understand, this code focuses on solid body motion rather than deformed patches. For me, I need to deform the overset mesh while the background mesh is not changed. In other words, the whole overset domain (I am not sure I should use the word 'domain') should deform properly so that I can maintain mesh quality.

I guess I need to write a mesh motion solver for overset mesh region.

Any help will be greatly appreciated.

Hello Thaw,

Did you figure out how to deform the overset body?

In addtion, do you know how to deform the background mesh with overset? I try to use overset mesh in a deforming background mesh.

I noticed dynamicOversetFvMesh is derived from dynamicMotionSolverFvMesh which means overset should be able to coupled with dynamic motion solver like velocity/dispalcementLaplacian. But I do not know how to set up the dynamicMeshDict. Do I need write code to integrate overset with deforming?

Thank you!
Michael

Anyone manage to get it working - overset mesh with deformation?

I wonder if it is possible, or the source code must be modified to make it work this way.

Just saw this post in the forum:

https://www.cfd-online.com/Forums/op...ront-mesh.html

Wonder if it can work.

Hi Thaw,

How are you doing?

I have the same problem with using flexible overset mesh on OpenFOAM, have you managed to solve this problem?

Best,
Tian