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-   -   Mesh Morphing in CFX ??? (http://www.cfd-online.com/Forums/cfx/81158-mesh-morphing-cfx.html)

vmlxb6 October 18, 2010 15:59

Mesh Morphing in CFX ???
 
Does anyone know what mesh morphing actually is ??? A ppt document on the official ANSYS site talks about mesh morphing being used for large mesh deformation and to avoid re-meshing.It gives the example of ball valve and butterfly valve tutorial. My case is very similar to the ball valve.
But I cannot find any particular tutorial or theory on it ???

Can anyone help me with how I can implement mesh morphing in CFX???

Thank you very much.

ghorrocks October 18, 2010 17:56

Duplicate post - please post questions once only.

Lots of examples in the CFX tutorials.

vmlxb6 October 18, 2010 18:55

@ Ghorocks
 
Butterfly valve and FSI in a ball valve tutorial does not mention mesh morphology anywhere ????? Can u name one tutorial that has mesh morphology ??????

Thank you.

ghorrocks October 18, 2010 20:17

Mesh morphing = moving mesh. Same thing.

vmlxb6 October 18, 2010 20:36

Ooohhhhh !!!!!!! I should have known........I thought it was some kind of algorithm used for solving mesh diffusion equation !!!!!!!!!!

Thanks !!

tillx October 19, 2010 20:23

I'm not sure if mesh morphing == moving mesh only. I'm playing around with that feature right now to see if I can put it to some use to solve my problem. When I setup a mesh with Advanced / Mesh Morphing / Enabled, the initial mesh is created according to the imported CAD data. When I update the Geometry in Workbench and Update then the mesh, the initial mesh is stretched to fit the new geometry. I haven't figured out to what extend that stretching works but it seems that the same nodes of the previous mesh are automatically spatially relocated. Moreover, if I Duplicate that initial Mesh in Workbench, the Mesh Morphing seems to carry over into the Duplicate Mesh, which is nice so I can setup my array of interlinked Meshes to run several trials of the transient simulation without having to remesh every time again. I haven't figured out yet how far the Mesh Morphing stretches and what happens, when new nodes are created. And most importantly for my problem, if mass continuity is maintained that way between individual transient steps with separate meshes. Isn't it thrilling !!!:)

vmlxb6 October 19, 2010 20:25

WOWW thats amazing.....Didnt know meshing could get so interesting !!!!!

vmlxb6 October 19, 2010 20:28

Inferring from what you wrote, is mesh morphing an option ??? that can be enabled or disabled ????? I dont think so !!!!!! How are you playing with it ????

tillx October 19, 2010 20:41

Well, I'm warming up to the subject myself right now. Check out at the bottom of "Advanced" when you click on the Mesh Icon in the Feature Management Tree and try it. Let me know if you find out something new. I'm out for now on this topic. Good luck!

vmlxb6 October 19, 2010 21:05

Are you talking about the work bench ?????? Coz am using stand alone and not work bench !!!!!

Best of luck to you !!!!!!

vmlxb6 March 9, 2011 15:59

Am supposed to be using this mesh stiffness parameter which makes my mesh stiff along the boundary, and less stiff as it goes away. The stiffness range is from 1e-15 to 1e15.
Is it the stiffness effect the causes the BL to defom i guess.
Am using 3 different mes snothings
Ha anyone done the turotial # 22: Fluid structure interaction & nesh deformation ???

Thank you.


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