Mesh motion test without the fluid equations.

enrin · October 1, 2023, 06:31

Dear all,

I am setting up my dynamic mesh case and, at the moment, I am simply trying to reproduce the prescribed motion that I want to get.

Since I'm doing a lot of changes and tests, I am frequently running into simulations that stop because of huge Courant numbers and that's why I would like to know if there is a way to exclude the fluid equations from the simulation and to test only the prescribed mesh motion defined in the dynamicMeshDict, without taking into account the physics behind the problem.

I have done a big search but I did not find anything interesting. Please let me know if there is a possible solution that escaped my inspection.
Many thanks in advance to all!!

Yann · October 1, 2023, 12:42

Hello,

It sounds like a job for moveDynamicMesh!

Cheers,
Yann

enrin · October 2, 2023, 04:35

Thank you Yann, your answer was really helpful.
I just tried it and it saved my a lot of useless work.

October 1, 2023, 06:31	Mesh motion test without the fluid equations.	#1
enrin New Member Join Date: Jul 2023 Posts: 15 Rep Power: 2	Dear all, I am setting up my dynamic mesh case and, at the moment, I am simply trying to reproduce the prescribed motion that I want to get. Since I'm doing a lot of changes and tests, I am frequently running into simulations that stop because of huge Courant numbers and that's why I would like to know if there is a way to exclude the fluid equations from the simulation and to test only the prescribed mesh motion defined in the dynamicMeshDict, without taking into account the physics behind the problem. I have done a big search but I did not find anything interesting. Please let me know if there is a possible solution that escaped my inspection. Many thanks in advance to all!!

October 2, 2023, 04:35		#3
enrin New Member Join Date: Jul 2023 Posts: 15 Rep Power: 2	Thank you Yann, your answer was really helpful. I just tried it and it saved my a lot of useless work. Yann likes this.

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October 1, 2023, 12:42		#2
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,080 Rep Power: 26	Hello, It sounds like a job for moveDynamicMesh! Cheers, Yann