Naming selections in CFX pre

matix_tx · December 17, 2014, 14:50

Hello everybody, I have one simple question: is it possible to name selection in CFX pre, because I have received a msh. file without properly defined borders and would like to define it all over again.

Thank you

sunilpatil · December 17, 2014, 15:42

Search for 2d primitives in CFX Pre (If you have done a structured mesh)

matix_tx · December 17, 2014, 17:40

Unfortunately mesh is unstructured. I have tried to convert it into geometry file in FE modeler, but i have problems converting it into parasolid (this option does not appear). Do you maybe know the easiest way to convert it in geom file? Thank you very much, I am new to ansys and have a lot to learn

ghorrocks · December 17, 2014, 19:34

In CFX-Pre the mesh primitives will be shown, if any exist. If none exist then your only option is to go to software which can edit meshes (ICEM is my weapon of choice, but others can do it as well) and manually define the mesh regions and boundaries. This will generate a mesh with boundaries on it for use in CFX.

Parasolid is a solid modelling format, not a mesh format. That is not going to work.

Are you trying to generate a solid model from a mesh? This is often tricky - you can convert your mesh to STL and import the STL surface into many solid modelling packages. This is messy and gives horrible models composed of zillions of facets.

matix_tx · December 18, 2014, 05:08

Thanks for the response. Actually I have succeeded converting msh. file to solid geometry model using FE modeler and now I can simply build new mesh. However I prefer using old msh. file, because it is propely defined. But I have problems opening msh. file in ICEM ( Error in opening Mesh file.
Unloaded unstructured domain), and I have changed suffix to .uns, but it does not open mesh. However if i load this mesh in Fluid flow (CFX) I cannot change it anymore.

Thank you

ghorrocks · December 18, 2014, 05:29

To get it into ICEM you will need to do a bit of juggling. Take it into CFX-Pre and generate a def file. Just a dummy one will be fine. Then you can load the def file in ICEM.

December 17, 2014, 14:50	Naming selections in CFX pre	#1
matix_tx New Member Join Date: Jul 2014 Posts: 8 Rep Power: 12	Hello everybody, I have one simple question: is it possible to name selection in CFX pre, because I have received a msh. file without properly defined borders and would like to define it all over again. Thank you

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December 17, 2014, 15:42		#2
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Search for 2d primitives in CFX Pre (If you have done a structured mesh)

December 17, 2014, 17:40		#3
matix_tx New Member Join Date: Jul 2014 Posts: 8 Rep Power: 12	Unfortunately mesh is unstructured. I have tried to convert it into geometry file in FE modeler, but i have problems converting it into parasolid (this option does not appear). Do you maybe know the easiest way to convert it in geom file? Thank you very much, I am new to ansys and have a lot to learn

December 17, 2014, 19:34		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	In CFX-Pre the mesh primitives will be shown, if any exist. If none exist then your only option is to go to software which can edit meshes (ICEM is my weapon of choice, but others can do it as well) and manually define the mesh regions and boundaries. This will generate a mesh with boundaries on it for use in CFX. Parasolid is a solid modelling format, not a mesh format. That is not going to work. Are you trying to generate a solid model from a mesh? This is often tricky - you can convert your mesh to STL and import the STL surface into many solid modelling packages. This is messy and gives horrible models composed of zillions of facets.

December 18, 2014, 05:08		#5
matix_tx New Member Join Date: Jul 2014 Posts: 8 Rep Power: 12	Thanks for the response. Actually I have succeeded converting msh. file to solid geometry model using FE modeler and now I can simply build new mesh. However I prefer using old msh. file, because it is propely defined. But I have problems opening msh. file in ICEM ( Error in opening Mesh file. Unloaded unstructured domain), and I have changed suffix to .uns, but it does not open mesh. However if i load this mesh in Fluid flow (CFX) I cannot change it anymore. Thank you

December 18, 2014, 05:29		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	To get it into ICEM you will need to do a bit of juggling. Take it into CFX-Pre and generate a def file. Just a dummy one will be fine. Then you can load the def file in ICEM.