[ICEM] STL file meshing

ld1305 · January 13, 2012, 18:53

Hi, I'm kind of new to ICEM as the meshing I've done before has been for 2D pipes in which case I used Gambit, or for FEA in which case I used Ansys Workbench.

I have an STL file which I have to generate a mesh for for part of my project but am not sure where to get started. The tutorials and other things I've read appear to be suggesting I use tetra method or octane but I have no idea how to make the stl file I have mesh as it appears to have a lot of gaps in it.

Is there anything I'm missing?

I've tried repairing the mesh but this doesn't seem to ass many more edges

Thanks very much

dizzy · January 16, 2012, 04:47

Hi,

Have your read this?
http://www.cfd-online.com/Forums/ans...face-icem.html

ld1305 · January 16, 2012, 05:19

Yeah I had, though most of the steps appear not to work for my file, in particular the repairing surface geometry and the diagnostic topology. It seems to have quite a few gaps in it that don't like this method.

I'll try it again later though, but at the moment I'mmore stuck on how to set inlets and outlets so I'll try that too.

Thanks

PSYMN · January 17, 2012, 18:42

If you can, please post a screen shot of your trouble spots...

Perhaps it will help us understand or perhaps we can tell you that your STL is just too terrible

ld1305 · January 17, 2012, 18:57

It's likely that it is, though I was given it by a lecturer for me to carry out some testing, I'll try and get a screen shot tomorrow

ld1305 · January 26, 2012, 11:21

Hi, sorry this so long, but this is what I've been given with no alteration

http://www.flickr.com/photos/7523180...n/photostream/

Essentially I want to create a plane along each of the blue lines at inlets and outlets to make these edges flat so they can be used as better inlets and outlets?

I know how to generate the mesh when this is done, just having a few issues witht his aspect

cdegroot · January 26, 2012, 15:17

Looking forward to a response to this thread; I am experiencing a very similar trouble!

ld1305 · January 26, 2012, 18:24

I think I've combatted part of the problem, by creating a local coordinate system (as my outlets were all at odd angles) and using this to create four points in a square around the inlets and outlets with points, then making a surface using them, and using the surface intersection tool to create a surface around where the new inlet/outlet will be

January 13, 2012, 18:53	STL file meshing	#1
ld1305 Member Lauren Dransfield Join Date: Jan 2012 Posts: 50 Rep Power: 14	Hi, I'm kind of new to ICEM as the meshing I've done before has been for 2D pipes in which case I used Gambit, or for FEA in which case I used Ansys Workbench. I have an STL file which I have to generate a mesh for for part of my project but am not sure where to get started. The tutorials and other things I've read appear to be suggesting I use tetra method or octane but I have no idea how to make the stl file I have mesh as it appears to have a lot of gaps in it. Is there anything I'm missing? I've tried repairing the mesh but this doesn't seem to ass many more edges Thanks very much

January 17, 2012, 18:42		#4
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	If you can, please post a screen shot of your trouble spots... Perhaps it will help us understand or perhaps we can tell you that your STL is just too terrible __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

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January 16, 2012, 04:47		#2
dizzy New Member Join Date: Jun 2011 Posts: 10 Rep Power: 15	Hi, Have your read this? http://www.cfd-online.com/Forums/ans...face-icem.html

January 16, 2012, 05:19		#3
ld1305 Member Lauren Dransfield Join Date: Jan 2012 Posts: 50 Rep Power: 14	Yeah I had, though most of the steps appear not to work for my file, in particular the repairing surface geometry and the diagnostic topology. It seems to have quite a few gaps in it that don't like this method. I'll try it again later though, but at the moment I'mmore stuck on how to set inlets and outlets so I'll try that too. Thanks

January 17, 2012, 18:57		#5
ld1305 Member Lauren Dransfield Join Date: Jan 2012 Posts: 50 Rep Power: 14	It's likely that it is, though I was given it by a lecturer for me to carry out some testing, I'll try and get a screen shot tomorrow

January 26, 2012, 11:21		#6
ld1305 Member Lauren Dransfield Join Date: Jan 2012 Posts: 50 Rep Power: 14	Hi, sorry this so long, but this is what I've been given with no alteration http://www.flickr.com/photos/7523180...n/photostream/ Essentially I want to create a plane along each of the blue lines at inlets and outlets to make these edges flat so they can be used as better inlets and outlets? I know how to generate the mesh when this is done, just having a few issues witht his aspect

January 26, 2012, 15:17		#7
cdegroot Senior Member Chris DeGroot Join Date: Nov 2011 Location: Canada Posts: 414 Rep Power: 18	Looking forward to a response to this thread; I am experiencing a very similar trouble!

January 26, 2012, 18:24		#8
ld1305 Member Lauren Dransfield Join Date: Jan 2012 Posts: 50 Rep Power: 14	I think I've combatted part of the problem, by creating a local coordinate system (as my outlets were all at odd angles) and using this to create four points in a square around the inlets and outlets with points, then making a surface using them, and using the surface intersection tool to create a surface around where the new inlet/outlet will be