Moving mesh simulation with mesh changes inside the solver

cgoessni · January 19, 2022, 06:07

I currently run a moving mesh case with multiple meshes, i.e. I run simulation A from time 0 to time t_A, then I map the results from simulation A, t_A onto a new mesh, same geometry, but different number of cells, and run the simulation B from time t_A until t_B, then I again map onto a new mesh and so on:

Code:

Simulation A, mesh A
    runs from t_0 to t_A
Simulation B, mesh B
    maps results Simulation A to mesh B (time t_A)
    runs from t_A to t_B
Simulation C, mesh C
.
.
.

The reason for this procedure is that I have high deformations of my mesh, and I could not run the whole simulation using just one mesh.

Does anybody know if there is a possibility of doing this mesh exchange inside a solver? I guess I would need a topology changer? Has anybody done such a project and could be so friendly and share his insight?

Thanks!

jalvathi · January 23, 2022, 17:03

Quote:

Originally Posted by cgoessni

I currently run a moving mesh case with multiple meshes, i.e. I run simulation A from time 0 to time t_A, then I map the results from simulation A, t_A onto a new mesh, same geometry, but different number of cells, and run the simulation B from time t_A until t_B, then I again map onto a new mesh and so on:

Code:

Simulation A, mesh A
    runs from t_0 to t_A
Simulation B, mesh B
    maps results Simulation A to mesh B (time t_A)
    runs from t_A to t_B
Simulation C, mesh C
.
.
.

The reason for this procedure is that I have high deformations of my mesh, and I could not run the whole simulation using just one mesh.

Does anybody know if there is a possibility of doing this mesh exchange inside a solver? I guess I would need a topology changer? Has anybody done such a project and could be so friendly and share his insight?

Thanks!

Hello cgoessni,

I think, you can use the mapFields option to map the results from one result/mesh to a different mesh. Please check the link here which shows how to map one results to a new mesh setup.

I hope, this helps.

Regards,
Jalvathi

cgoessni · January 24, 2022, 10:14

Hi!

Thank you for your reply, but I already use mapFields in my workflow. However, this procedure takes a lot of time compared to the actual CFD solver part, so I thought that putting the mesh-to-mesh part inside the actual CFD solver would speed things up.

Thanks.

January 19, 2022, 06:07	Moving mesh simulation with mesh changes inside the solver	#1
cgoessni New Member Clemens Goessnitzer Join Date: Nov 2021 Posts: 6 Rep Power: 4	I currently run a moving mesh case with multiple meshes, i.e. I run simulation A from time 0 to time t_A, then I map the results from simulation A, t_A onto a new mesh, same geometry, but different number of cells, and run the simulation B from time t_A until t_B, then I again map onto a new mesh and so on: Code: Simulation A, mesh A runs from t_0 to t_A Simulation B, mesh B maps results Simulation A to mesh B (time t_A) runs from t_A to t_B Simulation C, mesh C . . . The reason for this procedure is that I have high deformations of my mesh, and I could not run the whole simulation using just one mesh. Does anybody know if there is a possibility of doing this mesh exchange inside a solver? I guess I would need a topology changer? Has anybody done such a project and could be so friendly and share his insight? Thanks!

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January 24, 2022, 10:14		#3
cgoessni New Member Clemens Goessnitzer Join Date: Nov 2021 Posts: 6 Rep Power: 4	Hi! Thank you for your reply, but I already use mapFields in my workflow. However, this procedure takes a lot of time compared to the actual CFD solver part, so I thought that putting the mesh-to-mesh part inside the actual CFD solver would speed things up. Thanks.