CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Meshing Format & General Technical

How to generate refined 3D tetrahedra etc mesh for free

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 28, 2008, 08:39
Default Hello, could you share your
  #1
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
Hello,

could you share your experience in creating non-trivial geometries and making a refined mesh afterwards? By "refined" I mean for example finer at some boundaries comparing with inner cells.
blockMesh is handling only hexaedra and does no refinement...

Thanks!
kar is offline   Reply With Quote

Old   January 28, 2008, 09:32
Default Hi, Kārlis I do not have e
  #2
New Member
 
George Kokotis
Join Date: Mar 2009
Posts: 9
Rep Power: 8
gkokgr is on a distinguished road
Hi, Kārlis

I do not have experience with it, but would you like to have a look at CAELinux(http://www.caelinux.com)? It includes OpenFOAM 1.4.1 and the basic pre/post processor, SALOME, seems really interesting... (although it appears it needs some intermediate format conversion to pass data to FOAM (via UNV files). It also includes GMSH.
gkokgr is offline   Reply With Quote

Old   January 28, 2008, 09:56
Default Another distro?! Not again! I
  #3
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
Another distro?! Not again!
I'll take a look later, but I would rather prefer compiling from source and running on my own distro.

By the way - any comments about TetGen?
kar is offline   Reply With Quote

Old   January 28, 2008, 10:02
Default Since it is a livecd, you just
  #4
Senior Member
 
John Deas
Join Date: Mar 2009
Posts: 160
Rep Power: 8
johndeas is on a distinguished road
Since it is a livecd, you just run it, and cherry-pick packages you'll install on your fav distro
johndeas is offline   Reply With Quote

Old   January 28, 2008, 14:11
Default Hi, Kārlis did you look at
  #5
New Member
 
George Kokotis
Join Date: Mar 2009
Posts: 9
Rep Power: 8
gkokgr is on a distinguished road
Hi, Kārlis

did you look at the URL???? SALOME exists as a standalone package as well (I think the downloadable standalone package has binaries). In the Wiki there is also an example of using FOAM with SALOME. And John is right, I think. It is **merely** a (super-) supercharged PCLinuxOS LiveCD loaded with some really cutting edge scientific tools...For my part at least (as I am not a Linux guru, just vanilla user...), it would be a pain in the !@#$ to locate and install all these packages on my favorite distro...
gkokgr is offline   Reply With Quote

Old   January 28, 2008, 15:06
Default When download completes, I'll
  #6
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
When download completes, I'll write DVD and try it.
One more thing I would like to know - how about polyhedra mesh generators? Is it only gambit and similar proprietary software, that can make hexa- or even more face element meshes?
kar is offline   Reply With Quote

Old   January 28, 2008, 15:18
Default ...not sure about this one (so
  #7
New Member
 
George Kokotis
Join Date: Mar 2009
Posts: 9
Rep Power: 8
gkokgr is on a distinguished road
...not sure about this one (sorry). Maybe someone else could jump in and answer this one...
Before anything else check the tut. here:
http://www.caelinux.org/wiki/index.php/Doc:CAETutorials#Salome_.26_OpenFOAM_tuto rial:_3D_CFD_analysis_of_a_Y-shaped_pipe_.28CAELinux_2007.29
gkokgr is offline   Reply With Quote

Old   January 28, 2008, 20:51
Default Hi, This is the link to the
  #8
New Member
 
Florante
Join Date: Mar 2009
Posts: 7
Rep Power: 8
florante is on a distinguished road
Hi,

This is the link to the salome_meca binary package.

ftp://cae-linux:salome@caelinux.dyndns.org/packages/salome-meca-2007.1/SALOME-MECA-2007.1-GPL.tgz

installation notes here:

http://caelinux.com/CMS/index.php?op...d=41&Itemid=40

This is different version from the one in Salome-platform.org. This includes the Code_aster module.

I wonder if FoamX can be integrated to salome as a module as what Code_Aster did.
florante is offline   Reply With Quote

Old   January 29, 2008, 05:21
Default Hi, I have some comments a
  #9
New Member
 
Vanmaercke Simon
Join Date: Mar 2009
Location: Mol, Belgium
Posts: 8
Rep Power: 8
vanmaercke is on a distinguished road
Hi,

I have some comments about Tetgen. It is easy to refine your tet mesh generated with Tetgen if you have a set of points where you want refine.
This is done using the '-r' switch. Off course you will need to provide a file 'XXX-a.node' (where xxx is the name of your mesh) with the additional points you want to add. These points are usually easily derived from the estimated error on your solution..
Meshing rather complex shapes can indeed be done with salome (or netgen standalone (smaller)) or using STL input files and meshing them with tetgen. In my experience (2 years ago) Tetgen performed better then Netgen both on speed as robustness...
Regards,

Simon
vanmaercke is offline   Reply With Quote

Reply

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
Why Differences between tetrahedra polyhedra and prism mesh pipe flow computation with sonicLiquidFoam chnrdu OpenFOAM Running, Solving & CFD 4 June 17, 2008 06:21
Need someone to generate mesh RA FLUENT 7 May 4, 2007 11:36
Scalar problem with refined mesh- HELP PLEASE Sheila CD-adapco 0 June 11, 2005 20:35
Refined mesh for flat plate StarCD CD-adapco 0 May 31, 2004 10:52
visual3 can't work with refined mesh dell CD-adapco 0 December 15, 2002 06:00


All times are GMT -4. The time now is 14:43.