CFD Online URL
[Sponsors]
Home > Forums > Open Source Meshers: Gmsh, Netgen, CGNS, ...

Hexahedron 27 nodes

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 9, 2011, 04:23
Default Hexahedron 27 nodes
  #1
New Member
 
Join Date: Mar 2011
Posts: 6
Rep Power: 5
micheldup is on a distinguished road
Hello,

I have a test.geom file to generate a structured hexahedron mesh.
If I run gmsh with this option -order 1 I get what I expect that is to say
hexadrons with 8 nodes.
When I use the option -order 2 I get hexahedrons with 20 nodes.
How can I get hexahedrons with 27 nodes ?
Thanks a lot
micheldup is offline   Reply With Quote

Old   May 10, 2011, 03:24
Default
  #2
Senior Member
 
Mark Olesen
Join Date: Mar 2009
Location: http://olesenm.github.io/
Posts: 777
Rep Power: 17
olesen will become famous soon enough
Quote:
Originally Posted by micheldup View Post
Hello,

I have a test.geom file to generate a structured hexahedron mesh.
If I run gmsh with this option -order 1 I get what I expect that is to say
hexadrons with 8 nodes.
When I use the option -order 2 I get hexahedrons with 20 nodes.
How can I get hexahedrons with 27 nodes ?
Thanks a lot
You specify second-order, you get second-order. However, these would only be useful for a FEM and not a control volume code.

In case you didn't notice the gmsh manpage, it describes where all these nodes are located:
http://www.manpagez.com/info/gmsh/gm....0/gmsh_60.php

Or just google for second-order hexahedron (that's how I found the above manpage), I'm sure you will find something useful there. If not, you'll have to switch to a FEM forum where the people would know something about these types of shape functions.
olesen 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
SIMPLE algorithm SamR Main CFD Forum 11 March 31, 2014 16:15
Scale-Up Study in Parallel Processing with OpenFoam sahm OpenFOAM 10 April 26, 2010 18:37
Hexahedron Nodes use in Flow-3D ck5285 FLOW-3D 3 September 12, 2009 21:30
meshing F1 front wing Steve FLUENT 0 April 17, 2003 13:37
CFX4.3 -build analysis form Chie Min CFX 5 July 13, 2001 00:19


All times are GMT -4. The time now is 04:15.