[jwillie2000]

Hello All,

Trying to set up a simple case in Workbench for FSI and i am running into problems. I selected FSI:Fluid Flow (FLUENT)->Static Structural and then set up the Fluent case geo and mesh and solved the solution. I then could not get the solid geometry opened under Static Structural. When i open Model, the geo i get is the same as that for the CFD without the solid. I am looking for a good tutorial that can help me set up such a case. The main idea is just to use the CFD computed pressure as input load for the structural simulation. But i will also want to know how workbench can do 2 way FSI as well.

Thanks!
Jimmy

[Bionico]

Hello willie,
I'm not sure but I think that the 2-way FSI isn't possible with FLUENT: maybe you need CFX instead.

Regards

[Sixkillers]

2-FSI Structural is possible in Fluent via Workbnech's Coupling block. Definetely take a look at "Fluid-Structure Interaction (FSI) with ANSYS Fluent 14.5" course, which can be downloaded from ANSYS Customer Portal.

[Gowrav]

Hi James,
One tip, I dont know whether it will work in your case or not..
While Modeling Model both Solid and Fluid in same geometry, as two different volumes- design modeler..
Mesh it, two separate mesh will be there.
For fluid analysis - "Suppress" Solid Mesh in mesh tool itself.
Complete the analysis import results by linking it to static structural
before proceeding to loading Unsuppress the solid and Suppress the fluid mesh.. Apply load on interface.. As required..
rem fluid and solid should be to separate volumes in same design modeler session..
You can obtain them by 'Freeze' one before creating other,,
Have a try..

[ViLaks]

Hello All,

I am trying to enhance the flow in natural convection HT problem. I have an idea of incorporating a vibrating plate inside my geometry, so that the vibrating plate causes ripples and enhances the flow and hence, the HT rate is enhanced. Can anyone suggest if and how this can be modelled using FSI? I am using Fluent for simulating the natural convection problem.

Thanks and Regards
Vignesh

[Gowrav]

Hi Vilaks,

In my opinion,
Its moving wall case. Model the vibrating plate as moving wall in CFD.
Unless there is no force transfer from the fluid to a solid vibrating plate, Coupled analysis(FSI) is not necessary. Simple flow analysis with plate having dynamic condition will resolve your case. If you want to go for stress analysis on vibrating plate, then FSI may be necessary.

-Gowrav

[ViLaks]

Originally Posted by Gowrav

Hi Vilaks,

In my opinion,
Its moving wall case. Model the vibrating plate as moving wall in CFD.
Unless there is no force transfer from the fluid to a solid vibrating plate, Coupled analysis(FSI) is not necessary. Simple flow analysis with plate having dynamic condition will resolve your case. If you want to go for stress analysis on vibrating plate, then FSI may be necessary.

-Gowrav

Dear Gowrav,

Thanks for your reply. Should I model the moving wall with udf to represent vibration ? In that case should I write the udf to represent position or velocity?

With Regards
Vignesh