CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[Technical] 2D Elements in OF

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 14, 2013, 03:08
Default 2D Elements in OF
  #1
New Member
 
woodwick's Avatar
 
Alessandro
Join Date: Feb 2013
Location: Italia
Posts: 15
Rep Power: 13
woodwick is on a distinguished road
Is it true that in OpenFOAM you cannot create 2D elements?
I would like to simulate a radiator panel with 2D elements and assign to those elements some thermal attributes.
In OpenFOAMwiki (2D Mesh Tutorial using GMSH) I read
OpenFOAM by default only works with 3D mesh elements.
Is it true also for the lastest OF2.2?

additional info:
In this sail-boat simulation I read that they used GMSH too.
(slide 27) the elements of the sail are not directly created in openFOAM
they create the mesh of the sail with "Structural grid generation (surface mesh in 3D space) by gmsh"
then "Conversion from gmsh mesh to openFOAM dictionary by gmshToDict"

But is a paper of 2007. I was wondering if with newer OF releases is there a simpler way?

Last edited by woodwick; June 14, 2013 at 03:16. Reason: misspelling
woodwick is offline   Reply With Quote

Old   June 14, 2013, 04:32
Default
  #2
Senior Member
 
akidess's Avatar
 
Anton Kidess
Join Date: May 2009
Location: Germany
Posts: 1,377
Rep Power: 30
akidess will become famous soon enough
For most purposes yes that's true, you exclusively use 3D elements. Exceptions are patches (boundary faces of a 3D mesh), thermal baffles (see http://www.openfoam.org/version2.2.0/thermophysical.php) and finite area meshes. You are not very clear why you insist on 2D elements, but thermal baffles sounds like what you are looking for.
__________________
*On twitter @akidTwit
*Spend as much time formulating your questions as you expect people to spend on their answer.
akidess is offline   Reply With Quote

Old   June 14, 2013, 07:27
Default
  #3
New Member
 
woodwick's Avatar
 
Alessandro
Join Date: Feb 2013
Location: Italia
Posts: 15
Rep Power: 13
woodwick is on a distinguished road
Thank you Anton.
By the way, the reason why I wanted to use 2D elements is that in the fluid volume I have very very very thin panels of metals. So I was thinking:
1) I could try to mesh those panels with an extrudeMesh, try to obtain very thin elements. But the thickness is so thin compared to the surface that unless extrudeMesh is capable of producing very high aspect ratio elements I would probably end up with some quite heavy mesh, just for some panels that from a volume point of view are negligible. And my machine is unfortunately not so powerful.
2) that's why I was thinking well... if I could use 2D elements it would be a lighter model.
But your suggestion about thermal baffles it's very good. With that I think that I can solve my problem.
woodwick is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
3D Windturbine simulation in SU2 k.vimalakanthan SU2 15 October 12, 2023 06:53
Ansys SIG$ILL error loth ANSYS 3 December 24, 2015 06:31
[Gmsh] Vertex numbering is dense KateEisenhower OpenFOAM Meshing & Mesh Conversion 7 August 3, 2015 11:49
Penetrating elements in extruded mesh Michael P CFX 2 May 20, 2005 09:06
CFX4.3 -build analysis form Chie Min CFX 5 July 13, 2001 00:19


All times are GMT -4. The time now is 06:51.