[decibelle]

hello,

I work with a moving mesh (oscillating and rotating mesh motion) with pimpledymfoam. I would like to refine this mesh during the running. is it possible with pimpledymfoam?
what I have to do?

thanks in advance

[Tobi]

Hi,

short answer to a short question. Yes it is. There is the dynamicRefineFvMesh Lib (hope I wrote it correct). Here you can refine the mesh based on a quantity. It is called adaptive mesh refinement (AMR). One case can be checked out here: http://www.holzmann-cfd.de/index.php...aptive-meshing

However, the actual lib can only handle 3d cases properly. 2D case refinement is not possible and you only can refine hexaeders. All other volume types will be protected.

[decibelle]

thank you so much, it's just what I need

[guin]

Originally Posted by Tobi

Hi,

short answer to a short question. Yes it is. There is the dynamicRefineFvMesh Lib (hope I wrote it correct). Here you can refine the mesh based on a quantity. It is called adaptive mesh refinement (AMR). One case can be checked out here: http://www.holzmann-cfd.de/index.php...aptive-meshing

However, the actual lib can only handle 3d cases properly. 2D case refinement is not possible and you only can refine hexaeders. All other volume types will be protected.

Just an observation:
From here one cannot deduce the compatibility of AMR with mesh motion in OpenFOAM. I think this was the initial question at this thread.

From my understanding, AMR uses "dynamicRefineFvMesh" and mesh motion uses "dynamicMotionSolverFvMesh". They are both "dynamicFvMesh"-based, but (I think that) their current implementation did not take into account their simultaneous use in a single case. In fact, both use the same dictionary (constant/dynamicFvMesh file), where you first must specify what kind of dynamicFvMesh utility do you want to use e.g. "staticFvMesh", "dynamicRefineFvMesh", "dynamicMotionSolverFvMesh", etc...

Please, correct me if I am wrong. Indeed I would be glad if anyone was able to use both functionalities within the same run and could share with the community the keypoints for that to work.

[decibelle]

Originally Posted by guin

Just an observation:
From here one cannot deduce the compatibility of AMR with mesh motion in OpenFOAM. I think this was the initial question at this thread.

From my understanding, AMR uses "dynamicRefineFvMesh" and mesh motion uses "dynamicMotionSolverFvMesh". They are both "dynamicFvMesh"-based, but (I think that) their current implementation did not take into account their simultaneous use in a single case. In fact, both use the same dictionary (constant/dynamicFvMesh file), where you first must specify what kind of dynamicFvMesh utility do you want to use e.g. "staticFvMesh", "dynamicRefineFvMesh", "dynamicMotionSolverFvMesh", etc...

Please, correct me if I am wrong. Indeed I would be glad if anyone was able to use both functionalities within the same run and could share with the community the keypoints for that to work.

Yes, you're right, it was my initial question. I try since 2 month to refine and to move the mesh, but actually I don't have any result.

[Tobi]

Hi all,

I am sorry that I did not get the real point of the question. To complete everything and proof what Guin already said:

• You cannot do motion + refinement in FOAM with the standard utilities
• You can make it possible - I did it already 2 years ago
• Unfortunately, the command rm -r OpenFOAM2.4.x was too fast and I lost my development
• As a guideline: You have to make a new library that first calls the lib which moves the mesh and then calls the lib which refines it

Based on the fact that I just tested it and lost my lib, I never did it again because there was no need (for my purpose). Sorry for that bad new. But if you will make such a library, I guess the community would be happy to have it

Again. Sorry for the miss understanding.



Good luck.

[pippo2013]

Hi Decibelle,

have you succeded in combining mesh moving and refining?
It would be a great help for me!