CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] .stl file shell to solid part

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree2Likes
  • 1 Post By emily.imdieke
  • 1 Post By Far

Reply
 
LinkBack Thread Tools Display Modes
Old   April 4, 2013, 14:09
Default .stl file shell to solid part
  #1
New Member
 
Emily Imdieke
Join Date: Apr 2013
Posts: 20
Rep Power: 4
emily.imdieke is on a distinguished road
Hello,
I have an .stl file that contains a shell that I want to run using Ansys CFX. I don't know if it is possible to get ICEM to create a solid mesh through the empty core of the shell or if there is a way to make the .stl file solid in ICEM? I can get the shell mesh to import into Ansys but once this is done I can't set up up the boundary conditions due to it being a shell and what appears to be a lack of specified sections. Does anyone have any pointers for this?
emily.imdieke is offline   Reply With Quote

Old   April 4, 2013, 14:49
Default
  #2
Senior Member
 
Astio Lamar
Join Date: May 2012
Location: Pipe
Posts: 154
Rep Power: 5
asal is on a distinguished road
Hi!

You can import the stl file as both mesh and geometry.
File => import Geometry => STL
File => import Mesh => STL

So if you import it as geometry, then you have a solid surface and you can generate mesh for it.
asal is offline   Reply With Quote

Old   April 4, 2013, 15:40
Default
  #3
New Member
 
Emily Imdieke
Join Date: Apr 2013
Posts: 20
Rep Power: 4
emily.imdieke is on a distinguished road
I have done that, but that just imports the shell geometry and I need a solid geometry.
emily.imdieke is offline   Reply With Quote

Old   April 4, 2013, 22:59
Default
  #4
Senior Member
 
Astio Lamar
Join Date: May 2012
Location: Pipe
Posts: 154
Rep Power: 5
asal is on a distinguished road
Hi!

Why you need a solid geometry. You need just shell geometry for meshing. ICEM will consider solid part (Body) out of the shells when you generate the mesh.
asal is offline   Reply With Quote

Old   April 5, 2013, 12:39
Default
  #5
New Member
 
Emily Imdieke
Join Date: Apr 2013
Posts: 20
Rep Power: 4
emily.imdieke is on a distinguished road
Because I need that area inside the shell to be considered a solid body and meshed unless there is another way to do this to set up fluid flow running through in the shell.

Thanks,
Emily Imdieke
a.sarami likes this.
emily.imdieke is offline   Reply With Quote

Old   April 5, 2013, 14:13
Default
  #6
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,914
Blog Entries: 6
Rep Power: 38
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
ICEM is surface modeller. To get the volume meshing you need material points.
davidwilcox likes this.
Far is offline   Reply With Quote

Old   August 18, 2013, 14:04
Default Fill it
  #7
New Member
 
siaarzh's Avatar
 
Serzh
Join Date: Nov 2012
Posts: 4
Rep Power: 4
siaarzh is on a distinguished road
If you're in the Design Modeller, do the following:

1) Make sure there are no gaps (use Surface Patch if you must)
2) Use Tools/Fill:
- Extraction Type: By Caps
- Target Bodies: Selected Bodies
- Bodies: 1 (select your patch)
- don't preserve capping bodies nor solids
3) Press "Generate"
siaarzh is offline   Reply With Quote

Old   August 20, 2013, 03:32
Default the same problem
  #8
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
I have also the same problem. I have STL surface mesh from MRI with one input and one output. The mesh is only on the surface. I read the Aorta example and tried to add two inlet and outlet parts, but to no avail. I cannot select inlet and outlet parts because there is actually no surface there, they are only two holes!
would you please help me how to get the volumetric mesh out of this surface and assign BCs on inlet and outlet?
Thanks
Ali
a.sarami is offline   Reply With Quote

Old   August 20, 2013, 11:46
Default
  #9
New Member
 
Emily Imdieke
Join Date: Apr 2013
Posts: 20
Rep Power: 4
emily.imdieke is on a distinguished road
For my geometry I ended up having to add points around the outlet and inlet, turn these into curves, and then create surfaces out of these curves in order to create the volumetric mesh.

I hope that helps.
emily.imdieke is offline   Reply With Quote

Old   August 20, 2013, 13:01
Default
  #10
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
Dear Emily,
Thank you for your message. Actually my input and output are complex and I need too many points to get a good curve and so surface, and putting points on the edge manually is a very hard job. Do you know any other alternative way?
Cheers
a.sarami is offline   Reply With Quote

Old   August 20, 2013, 13:12
Default
  #11
New Member
 
siaarzh's Avatar
 
Serzh
Join Date: Nov 2012
Posts: 4
Rep Power: 4
siaarzh is on a distinguished road
I'd love to help you, Ali. But it would be good to see the geometry itself. Can you post a picture? Are you using DesignModeler to work with the geometry?

One idea: maybe you could create surfaces that cover up the inlet and outlet. Then boolean it (cut the outsides) and fill the resulting geometry to create a fluid zone.
__________________
---

Guys, I'm a noob. Help me and I'll help you too.
I use ANSYS Fluent, but dabble in some meshing and modelling using CATIA, CFTurbo, Pointwise, and Hyperworks.
siaarzh is offline   Reply With Quote

Old   August 20, 2013, 13:27
Default
  #12
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
Dear Serzh,
Thank you so much for your message and help. Please see the photos. Yes I need to fill the geometry to get the fluid zone and for it I need to first close the geometry.
Please take a look at the photos.
I am using ICEM CFD not the DesignModeler.
Attached Images
File Type: png 1.png (83.1 KB, 21 views)
File Type: png 2.png (92.7 KB, 14 views)
a.sarami is offline   Reply With Quote

Old   August 20, 2013, 15:11
Default
  #13
New Member
 
siaarzh's Avatar
 
Serzh
Join Date: Nov 2012
Posts: 4
Rep Power: 4
siaarzh is on a distinguished road
Quote:
Originally Posted by a.sarami View Post
Dear Serzh,
Thank you so much for your message and help. Please see the photos. Yes I need to fill the geometry to get the fluid zone and for it I need to first close the geometry.
Please take a look at the photos.
I am using ICEM CFD not the DesignModeler.
I'm not very familiar with ICEM, since I never used scanned data for cfd. DM was enough for simple model generation.

But from what I tried out in the past hour in ICEM, I believe you could try to use "Geometry/Create faceted/Faceted cleanup/Close faceted holes". Select the inlet or outlet boundary by click-drag (box select). This should close it.
siaarzh is offline   Reply With Quote

Old   August 20, 2013, 17:09
Default
  #14
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
Thank you very much Serzh. It just works and I closed the inlet and outlet. But how to fill the geometry for the fluid zone?
Thanks in advance
Ali
a.sarami is offline   Reply With Quote

Old   August 20, 2013, 17:14
Default
  #15
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
I assumed that you, Serzh, previously post about how to fill the shell in DM. It would be great if I can export my closed surface in ICEM and then import it in DM, is it possible? if yes, how?
Thanks
a.sarami is offline   Reply With Quote

Old   August 21, 2013, 02:27
Default
  #16
Member
 
Ali Sarami
Join Date: Jun 2010
Posts: 34
Rep Power: 7
a.sarami is on a distinguished road
Quote:
Originally Posted by emily.imdieke View Post
Because I need that area inside the shell to be considered a solid body and meshed unless there is another way to do this to set up fluid flow running through in the shell.

Thanks,
Emily Imdieke
Emily,
Would you please let me know how to fill the shell after closing it?
Best
a.sarami is offline   Reply With Quote

Reply

Tags
ansys cfx mesh, icem

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Error bulding swak4Foam sfigato OpenFOAM Installation 18 August 22, 2013 12:41
error message with modeling a cube with a hold at the center hsingtzu OpenFOAM Native Meshers: blockMesh 2 March 14, 2012 10:56
mesh airfoil NACA0012 anand_30 OpenFOAM Meshing & Mesh Conversion 12 December 12, 2011 05:16
Paraview command not found hardy OpenFOAM Paraview & paraFoam 7 September 18, 2008 04:59
error while compiling the USER Sub routine CFD user CFX 3 November 25, 2002 16:16


All times are GMT -4. The time now is 01:04.