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-   -   [ICEM] material point found problem (http://www.cfd-online.com/Forums/ansys-meshing/93555-material-point-found-problem.html)

mobiuss October 19, 2011 02:42

material point found problem
 
2 Attachment(s)
Hello,
I have a problem in delaunay volume mesh.
I defined 2 material point, fluid1 and fluid2 and I successed the octree mesh,
but I found the below message at delaunay volume mesh and fail to flood fill in fluid2.
"element containing material point fluid2.1 was not found"
I used default option in volume meshing parameters and coumpute mesh(inherited volume part name) option.

Can you give me a help to solve this problem? I would like to finish delaunay volume mesh in fluid1 and fluid2.

Thnaks in Advance,
Neal

Sushilkumar October 20, 2011 03:35

I tried the same case. Two concentric spheres of different diameters. you get octree mesh but when try to mesh with delaunay the second material point is not found.

I can suggest you to generate and export these two meshes separately and import into solver. I hope this workaround could help you.

BrolY October 20, 2011 03:48

With the Delaunay mesh option, you have to choose which material point you want to mesh.
I have never meshed two separated volumes with the Delaunay method, but maybe you could try to mesh your 1st volume, and then mesh the 2nd volume ?

PSYMN October 21, 2011 09:13

Mesh Internal Domains
 
No, it is just a simple setting...

Under the Mesh tab => Global mesh Setup => Volume Meshing Parameters => Tetra/Mixed => Quick (Delaunay) you will find an option for "mesh internal domains".

Turn that on and it will mesh volumes that do not touch the outer surface.

When it meshes your internal region, you will have an element where your material point is and it will all be fine...

Actually, while you are in there, you can turn on the option for "Flood fill after completion" and it will check for the material points automatically.

Have fun.

mobiuss October 23, 2011 21:59

Mesh Internal Domains
 
Hi, thank you your reply.

I turned on the "mesh internal domains", but this option meshed every internal domains. So the inside of propeller was also meshed.
Is it possible to delete only inside of propeller after delaunay mesh?


And I also turned on the "Flood fill after completion" option,
but it was same not to find the 2nd material point automatically.

Could you explain what I missed something?

PSYMN October 23, 2011 23:50

The mesh in the propeller is in one of the parts (maybe "CREATED_MATERIAL_#").

Find out which one it is, right click on the part in the tree and delete. Hit "Yes" to confirm the delete. Another option would be to create a material called "ORFN" and put it inside the propeller. I think Flood fill will delete elements in the ORFN part.

I am not sure that I understood your second comment. Are you saying it didn't run flood-fill? I think there was a bug about that a number of versions ago. You can go into "Edit Mesh => Repair" and run the flood fill option manually.


Best regards,

Simon

vincyc April 16, 2012 12:16

1 Attachment(s)
HI PSYMN, to me seems that this option doesn't work at all. I tried many times but nothing. I will attach an image.
As probably you can see the volume mesh is applied only to the surface attache to the outer one. I started with a surface mesh and then applied a volume one trough Quick (Delaunay). Do you have any suggestion?

Quote:

Originally Posted by PSYMN (Post 328899)
No, it is just a simple setting...

Under the Mesh tab => Global mesh Setup => Volume Meshing Parameters => Tetra/Mixed => Quick (Delaunay) you will find an option for "mesh internal domains".

Turn that on and it will mesh volumes that do not touch the outer surface.

When it meshes your internal region, you will have an element where your material point is and it will all be fine...

Actually, while you are in there, you can turn on the option for "Flood fill after completion" and it will check for the material points automatically.

Have fun.


PSYMN April 17, 2012 09:16

I know it has worked for others... Turn on both the Mesh internal volumes and the Flood fill option and it should work.

If not, and you are willing to share the model privately, I can test it for you.

Best regards,

Simon

Jeremie84 November 27, 2012 17:52

Hi,

I am facing the same problem. I am using ICEM CFD 12.1 for meshing a VAWT. I have 2 material points (one for the rotor region, one for the stator region). I first generate an octree mesh, then delete the volume mesh, and then generate the volume mesh with the Delaunay mesher (TGlib, Use AF). I check "Mesh internal domains" and "Flood fill after completion". But I keep having the same message :
element containing material point ROTATION.1 was not found

Only the external region is meshed, but the internal region (ROTATION) is not meshed.
Am I missing something ? With the octree method, the 2 domains are meshed...

Thank you very much

Jeremie

Jeremie84 November 28, 2012 10:34

2 Attachment(s)
I have attached some screen captures of the Global Mesh Setup, and the messages I get during the Delaunay meshing.
As I said, the 2 domains are meshed with the Octree method, but when I try to mesh with the Delaunay method, based on the surface mesh obtained with Octree, I keep having this problem...

Thank you

Jeremie

Tarantino June 27, 2013 05:08

Hello

I have the same issue.
I want to generate a multi-zone mesh. I creat material point, and I turned on the "mesh internal domains" and "Flood fill after completion". the mesh generated for all the volumes, but only on one material. I can not have them in different materials which I define already.
Can anyone assist me?
thanks.

Jeremie84 June 27, 2013 14:22

Hello Tarantino,
I had the same problem. Here is the answer from the ANSYS support I got:

"Hi Jérémie,
I tried your case and found that ICEM12.1 doesn't work and ICEM 13 and ICEM 14 work.Please update your ICEM. "

I tried the same case with ANSYS 14.5, and it worked. So, it seems to be a bug of the 12.1 release. That's all I can say.

Regards,

Jeremie

manav omakr April 1, 2015 06:59

Quote:

Originally Posted by PSYMN (Post 328899)
No, it is just a simple setting...

Under the Mesh tab => Global mesh Setup => Volume Meshing Parameters => Tetra/Mixed => Quick (Delaunay) you will find an option for "mesh internal domains".

Turn that on and it will mesh volumes that do not touch the outer surface.

When it meshes your internal region, you will have an element where your material point is and it will all be fine...

Actually, while you are in there, you can turn on the option for "Flood fill after completion" and it will check for the material points automatically.

Have fun.










even i have same problem my geometry has multiple material pointS ... and when i use delauny mesh by turning on flood field and mesh internal domain its detecting points and flood fill is failing and also tried using the edit mesh flood fill ( flood fill and make volume consistent ) its connecting the volume materials from centroid to the material points. in icem guide same is explained
is it we have to use different algorithm while geometry has multiple body pionts ?


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