[ravikr]

Hello Every1,


I want to simulate oscillating (sinnosodially) LPT blade in fluent for 10 degree amplitude. I came to know of dynamic meshing in the fluent. So inititially, just to learn the dynamic meshing, i simulate some 3D oblect with fully structred grid (Single Zone), but i was unable to give it motion. every time i got an error "-ve cell volume" because of very small distance near the surface (y plus=1) . After a lot of research on cfd online thread i came to know that remeshing works better for tri/tetra mesh (i think !). and to use multiple zone mesh.


So now I am simulating an elliptical blade with two mesh zones (Structre and tetra as shown in the figure (Mesh). the inner elliptical structured zone, i am moving it with the blade. But when i see display mesh motion only tetra element at interface of two mesh are streching rest of tetra zone is not adjusting itself although i made it deforming zone and after some time i get "-ve cell volume" error. i think remeshing is not happening in tetra zone.


I have gone through all the relevent thread and videos but they mostly on 2D geometry.


I am new to dynamic meshing and I have a few questions:

1. Is remeshing possible for 3D hybrid mesh ?

2. If yes then what remeshing method (cell, face, cutcell, region, 2.5D cylinder) would work for 3D hybrid mesh ?

3. What is the Dynamic mesh setting required?


4. What mesh zones setting required.

5. IS something wrong with the mesh parameters?


All the relevent images are attached. If any one require files/data related to the project i have no issue sharing it.


Thanks in advance

[Krasa]

hello could found the solution. I am also getting same error