CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

using non-orthogonal correction for the laplacian term

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

Like Tree3Likes
  • 3 Post By santiagomarquezd

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 3, 2011, 12:45
Default using non-orthogonal correction for the laplacian term
  #1
Senior Member
 
Steven van Haren
Join Date: Aug 2010
Location: The Netherlands
Posts: 149
Rep Power: 15
stevenvanharen is on a distinguished road
Dear all,

Hopefully one of you can help me with the following question:

If one uses (in fvSchemes):

laplacian(nu,U) Gauss linear corrected;

which correction is referred to? minimum correction, orthogonal correction or over-relaxed? (as referred to in the thesis of Jasak)

Thanks in advance.
stevenvanharen is offline   Reply With Quote

Old   January 3, 2011, 23:29
Default
  #2
Senior Member
 
Travis Carrigan
Join Date: Jul 2010
Location: Arlington, TX
Posts: 161
Rep Power: 15
tcarrigan is on a distinguished road
Hello,

I believe this is simply an orthogonal correction, used mainly for highly orthogonal grids (such as high aspect ratio anisotropic tets).
tcarrigan is offline   Reply With Quote

Old   January 4, 2011, 04:17
Default
  #3
Senior Member
 
Steven van Haren
Join Date: Aug 2010
Location: The Netherlands
Posts: 149
Rep Power: 15
stevenvanharen is on a distinguished road
Quote:
Originally Posted by tcarrigan View Post
Hello,

I believe this is simply an orthogonal correction, used mainly for highly orthogonal grids (such as high aspect ratio anisotropic tets).
Hi travis,

Ok, I understand this, I try to use it on polyhedral grids. But do you also know how this orthogonal correction is implemented? Jasak refers to three different possibilities (minimum correction, orthogonal correction or over-relaxed) which are all orthogonal corrections bu with different numerical behaviour.
stevenvanharen is offline   Reply With Quote

Old   January 8, 2011, 00:28
Default
  #4
Senior Member
 
santiagomarquezd's Avatar
 
Santiago Marquez Damian
Join Date: Aug 2009
Location: Santa Fe, Santa Fe, Argentina
Posts: 452
Rep Power: 23
santiagomarquezd will become famous soon enough
Until we've studied over-relaxed approach is what is implemented. Take a look of gaussLaplacianScheme.C lines 169-173, correctedSnGrad.C lines 56-108 and surfaceInterpolation.C lines 270-384.

Regards.
__________________
Santiago MÁRQUEZ DAMIÁN, Ph.D.
Research Scientist
Research Center for Computational Methods (CIMEC) - CONICET/UNL
Tel: 54-342-4511594 Int. 7032
Colectora Ruta Nac. 168 / Paraje El Pozo
(3000) Santa Fe - Argentina.
http://www.cimec.org.ar
santiagomarquezd is offline   Reply With Quote

Old   January 10, 2011, 08:58
Default
  #5
Senior Member
 
Steven van Haren
Join Date: Aug 2010
Location: The Netherlands
Posts: 149
Rep Power: 15
stevenvanharen is on a distinguished road
Great references to the code lines Santiago!

It is very clear now to me.
stevenvanharen 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
About nonorthogonal correction in fvclaplacian 7islands OpenFOAM Running, Solving & CFD 4 December 9, 2012 23:54
laplacian term in turbulent model chai OpenFOAM Running, Solving & CFD 4 March 8, 2012 10:28
curvature correction term, material derivative of a tensor volker OpenFOAM Programming & Development 7 June 3, 2010 09:08
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 16:45
Laplacian viscous stress term in compressible solver jelmer OpenFOAM Running, Solving & CFD 3 June 23, 2006 08:31


All times are GMT -4. The time now is 20:17.