Is this mesh transfer from one material to other okay for CFX?

abidkhan · January 3, 2018, 21:15

Hello,

I've used ANSYS meshing module for making which was too be used CFX. I had understanding that there should be common nodes at the boundary of one material to the other through which load and results transfer within domains (as in the mesh in the circle "A" of figure). I've feeling that mesh in the rectangle "B" is not okay as many modes are in-attached with the other side.

If once such mesh, is it okay? And if not, how can I force "meshing" to make mesh as in circle "A" on the figure.

ghorrocks · January 4, 2018, 00:32

CFX can use unmatched meshes using GGI interfaces. But it would be better to fix the mesh and make the mesh match. You can do this by defining them as multi body parts.

abidkhan · January 4, 2018, 04:10

Quote:

Originally Posted by ghorrocks

CFX can use unmatched meshes using GGI interfaces. But it would be better to fix the mesh and make the mesh match. You can do this by defining them as multi body parts.

These are defined as different domains and have different materials. How do I define them in meshing? Where can I find this option?

Gert-Jan · January 4, 2018, 04:38

1) Your mesh is not conformal. Did you make the mesh in Spaceclaim? If so, thenyou need to specify in Spaceclaim that the volumes "share topology". Then reload the geometry in ANSYS Meshing and you will get rid of the mesh connections in ANSYS mesher, resulting in a conformal mesh.
2) If you want to have a finer mesh in B or in the thin volumes, then you have to create mesh refinements. Of use proximity, in which you specify that you want a minimum number of elements between 2 adjacent surfaces.

abidkhan · January 5, 2018, 21:07

Quote:

Originally Posted by Gert-Jan

1) Your mesh is not conformal. Did you make the mesh in Spaceclaim? If so, thenyou need to specify in Spaceclaim that the volumes "share topology". Then reload the geometry in ANSYS Meshing and you will get rid of the mesh connections in ANSYS mesher, resulting in a conformal mesh.
2) If you want to have a finer mesh in B or in the thin volumes, then you have to create mesh refinements. Of use proximity, in which you specify that you want a minimum number of elements between 2 adjacent surfaces.

Thanks for reply. I've followed the method 2 and mesh is okay now. There are common nodes between joining materials as in region "A" of the image.

January 3, 2018, 21:15	Is this mesh transfer from one material to other okay for CFX?	#1
abidkhan New Member Abid Khan Join Date: Dec 2017 Posts: 23 Rep Power: 8	Hello, I've used ANSYS meshing module for making which was too be used CFX. I had understanding that there should be common nodes at the boundary of one material to the other through which load and results transfer within domains (as in the mesh in the circle "A" of figure). I've feeling that mesh in the rectangle "B" is not okay as many modes are in-attached with the other side. If once such mesh, is it okay? And if not, how can I force "meshing" to make mesh as in circle "A" on the figure.

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January 4, 2018, 00:32		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	CFX can use unmatched meshes using GGI interfaces. But it would be better to fix the mesh and make the mesh match. You can do this by defining them as multi body parts.

January 4, 2018, 04:38		#4
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	1) Your mesh is not conformal. Did you make the mesh in Spaceclaim? If so, thenyou need to specify in Spaceclaim that the volumes "share topology". Then reload the geometry in ANSYS Meshing and you will get rid of the mesh connections in ANSYS mesher, resulting in a conformal mesh. 2) If you want to have a finer mesh in B or in the thin volumes, then you have to create mesh refinements. Of use proximity, in which you specify that you want a minimum number of elements between 2 adjacent surfaces.