[MFWilliams]

Hello,


I am trying to run an FSI simulation on solids4foam using a geometry and a mesh which I have already generated in Ansys meshing which is made up of one part, linked below. I have managed to use fluent3DMeshToFoam to transfer the whole mesh to openfoam and have checked the mesh and it checks out alright.



However, for an FSI simulation, I am not sure if I will need to split the mesh into two parts so that I have the solid domain and the fluid domain and then import both of those to openfoam?


Please can someone tell me if I need to split my mesh up into both fluid and solid domains then import it or if it is easier to just import the whole thing then specify the domains?


Thank you
Merlin


Edit: Or is it possible to use the mesh which has both the solid and fluid domains, but when importing it to openfoam for the fluid domain to only specify the patches that relate to the fluid domain and so it just ignores the solid domain?

[Hgholami]

Hi,
In ANSYS, you first can design your geometry and use two region as fluid and solid, then meshing togethers. But to import to openfoam, you need suppress each region and define boundary interface and save each mesh separately. for using solids4Foam solver, you need to import each mesh as fluid or solid in relative folders.

[MFWilliams]

Ok great thank you. So I can leave the mesh that I currently have but just supress the solid domain when I import fluid mesh to openfoam and supress fluid domain when I import solid domain?

[Hgholami]

Yes,
Also, don't forget to define interface boundary for each regions.

[MFWilliams]

Amazing thank you very much.

Would you also mind hleping me create a time varying veloctity boundary condition?

[Hgholami]

I am not yet use time varying velocity. But you can use db().time().value() as time and modify available inlet velocity BC with your relation.

[MFWilliams]

Ok thank you