[ICEM] Extracting STL Mesh from STP Volume

Kina · February 3, 2014, 16:30

Hey there,
I am currently working with deformed .stl meshes and even if I convert them to iges volumes, the Design Modeller or Solidworks won't load them without crashing since my geometry has about 50k facets which makes it difficult to go for a mesh with regular ansys meshing. This is why I wanted to get it done with ICEM since it is robust for STL meshing. Now I got a STP file for my flow volume and the STL for the geometry. Is there any way to import both in ICEM and then just set the material points so that ICEM will create a tet volume mesh with inflation layers around my geometry?
I have also tried TGrid so far but could't figure out the import of multiple files and then to subtract one from the other.

Thanks
K

Kina · February 5, 2014, 11:36

Okay so I have managed to get my geometry in ICEM.
I have imported the hydrofoil as a .cdb mesh from ANSYS APDL and the flow volume as .stp from regular CAD. Then, I have defined two different parts (fluid, solid). Or at least they are named like that. Is it possible in ICEM to create an unstructured tet mesh in the FV and some inflation layers around my hydrofoil mesh?

Kina · February 5, 2014, 15:19

I could also convert my .cdb file to a parasolid with the FE Modeler and then use Boolean in DM to extract the body. However, then I end up with an extremely faceted body and ANSYS Meshing refuses to get an inflation layer around that. Is ICEM able to do that and how? I didn't find any thread or tutorial on how to mesh faceted geometry with inflation and tet volume elements for external flow applications.

Thanks!

Kina · February 6, 2014, 01:29

Alright,
so I managed to define my hydrofoil as solid, my domain as fluid, close the stl mesh with build topology and ended up creating my unstructured tets and my prism layers. there is only one thing left: my prism layers are not consistend around my model. They partially vanish in my tet mesh. How does that happen and how can I change that? (see pic)

February 3, 2014, 16:30	Extracting STL Mesh from STP Volume	#1
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	Hey there, I am currently working with deformed .stl meshes and even if I convert them to iges volumes, the Design Modeller or Solidworks won't load them without crashing since my geometry has about 50k facets which makes it difficult to go for a mesh with regular ansys meshing. This is why I wanted to get it done with ICEM since it is robust for STL meshing. Now I got a STP file for my flow volume and the STL for the geometry. Is there any way to import both in ICEM and then just set the material points so that ICEM will create a tet volume mesh with inflation layers around my geometry? I have also tried TGrid so far but could't figure out the import of multiple files and then to subtract one from the other. Thanks K

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February 5, 2014, 11:36		#2
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	Okay so I have managed to get my geometry in ICEM. I have imported the hydrofoil as a .cdb mesh from ANSYS APDL and the flow volume as .stp from regular CAD. Then, I have defined two different parts (fluid, solid). Or at least they are named like that. Is it possible in ICEM to create an unstructured tet mesh in the FV and some inflation layers around my hydrofoil mesh?

February 5, 2014, 15:19		#3
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	I could also convert my .cdb file to a parasolid with the FE Modeler and then use Boolean in DM to extract the body. However, then I end up with an extremely faceted body and ANSYS Meshing refuses to get an inflation layer around that. Is ICEM able to do that and how? I didn't find any thread or tutorial on how to mesh faceted geometry with inflation and tet volume elements for external flow applications. Thanks!

February 6, 2014, 01:29		#4
Kina Senior Member Alex Join Date: Jan 2014 Posts: 126 Rep Power: 12	Alright, so I managed to define my hydrofoil as solid, my domain as fluid, close the stl mesh with build topology and ended up creating my unstructured tets and my prism layers. there is only one thing left: my prism layers are not consistend around my model. They partially vanish in my tet mesh. How does that happen and how can I change that? (see pic)