CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > STAR-CCM+

Creating a volume mesh before converting to 2D mesh?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 25, 2012, 22:03
Default Creating a volume mesh before converting to 2D mesh?
  #1
New Member
 
Join Date: Sep 2012
Posts: 3
Rep Power: 4
westb is on a distinguished road
Hi,

I'm running a basic simulation of a marble in steady flow and I want to use a 2D mesh to save computer memory. My question is: why do I have to volume mesh my geometry before converting it to a 2D mesh? Why do I have to wait a long time for the software to produce a 3D volume mesh, just to make it 2D afterwards?

Thanks
westb is offline   Reply With Quote

Old   September 28, 2012, 15:02
Default
  #2
Member
 
John
Join Date: Aug 2009
Posts: 93
Rep Power: 7
nomad is on a distinguished road
Good question.
nomad is offline   Reply With Quote

Old   September 28, 2012, 16:13
Default
  #3
Senior Member
 
Join Date: Oct 2009
Location: Germany
Posts: 637
Rep Power: 12
abdul099 is on a distinguished road
Lol, why is it dark in the night?!? Does it help when I tell you, WHY you have to do it?
Even when you know the answer, you can't change it.

But when you want to solve on a 2D mesh, you don't need to mesh a huge 3D geometry. You can modify your geometry to be close to the 2D geometry you want to solve, e.g. cut a small slide out of your geometry.
That means, you still have to create a 3D mesh first, but you don't need to wait "a long time".
__________________
We do three types of jobs here:
GOOD, FAST AND CHEAP
You may choose any two!
abdul099 is offline   Reply With Quote

Old   September 28, 2012, 17:10
Default
  #4
Member
 
Yon Han Chong
Join Date: Jun 2012
Posts: 77
Rep Power: 5
yonchong is on a distinguished road
If you use the patch independent option 2-D mesh will be generated from surfaces rather than from the volume mesh.
yonchong is offline   Reply With Quote

Old   September 29, 2012, 13:17
Default
  #5
New Member
 
Join Date: Sep 2012
Posts: 3
Rep Power: 4
westb is on a distinguished road
Thanks for your responses. yonchong - is the patch independent option only an ANSYS option?

Thanks.
westb is offline   Reply With Quote

Old   September 29, 2012, 13:47
Default
  #6
Member
 
Yon Han Chong
Join Date: Jun 2012
Posts: 77
Rep Power: 5
yonchong is on a distinguished road
I am sorry I haven' t read your post properly.

For some reason I thought you are using ICEM for mesh generation.

If you generate surface mesh with ICEM You can choose whether you want to generate off the geometry surface (patch dependemt) or from 3d mesh (patch indepentant).
yonchong is offline   Reply With Quote

Reply

Tags
2d mesh, volume mesh

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
[ICEM] Negative volume error in hybrid mesh siw ANSYS Meshing & Geometry 4 September 3, 2014 05:25
SnappyHexMesh for internal Flow vishwa OpenFOAM Native Meshers: snappyHexMesh and Others 23 August 6, 2014 03:50
converting a surface mesh to volume mesh monish OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 0 June 25, 2012 06:23
mesh missing after import in fluent morteza08 FLUENT 0 July 23, 2010 02:22
mesh missing after export in gambit morteza08 Main CFD Forum 0 July 23, 2010 02:19


All times are GMT -4. The time now is 03:28.