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

Nvd / tvd

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

Like Tree2Likes
  • 2 Post By santiagomarquezd

Reply
 
LinkBack Thread Tools Display Modes
Old   October 7, 2011, 12:19
Default Nvd / tvd
  #1
New Member
 
Michael Buchmayr
Join Date: Mar 2010
Posts: 16
Rep Power: 6
MichiB is on a distinguished road
Hi,

I was wondering if there is a major difference in the implementation of NVD and TVD schemes in OpenFOAM.
Am I right in the assumption that the only real difference between NVD and TVD schemes in OpenFOAM is the limiters?
Is it right that in OpenFOAM TVD schemes are actually nothing but special NVD schemes?

I'm having a hard time grasping how convection schemes are implemented in OpenFOAM, but as far as I understand the code, both NVD and TVD should work identically up to the point where phict ( \Tilde{ phi_{C} } ) is being calculated.

The reason why I'm asking this is that I'd like to know how the van Leer TVD (or is it NVD?) scheme works and effects the diagonal dominance of my matrix...

Michi
MichiB is offline   Reply With Quote

Old   October 7, 2011, 17:30
Default
  #2
Senior Member
 
santiagomarquezd's Avatar
 
Santiago Marquez Damian
Join Date: Aug 2009
Location: Santa Fe, Santa Fe, Argentina
Posts: 418
Rep Power: 14
santiagomarquezd will become famous soon enough
Michael take a look to the document in the following link:

https://docs.google.com/viewer?a=v&p...ht7iRTTn&hl=es

Regards.
norman1981 and sabin.ceuca like this.
__________________
Santiago MÁRQUEZ DAMIÁN, Ph.D.
Post-doctoral Fellow
Research Center for Computational Mechanics (CIMEC) - CONICET/FICH-UNL
T.E.: 54-342-4511594 Ext. 1005
Güemes 3450 - (3000) Santa Fe
Santa Fe - Argentina
http://www.cimec.org.ar
santiagomarquezd is offline   Reply With Quote

Old   October 10, 2011, 06:39
Default
  #3
New Member
 
Michael Buchmayr
Join Date: Mar 2010
Posts: 16
Rep Power: 6
MichiB is on a distinguished road
Thank you for the nice summery, Santiago. Te lo agradezco mucho!
It seems that I was wrong and TVD schemes in OpenFOAM do calculate r and not phict as I thought before.
Regards,
Michi
MichiB 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
Interpolation in OpenFoam srinath OpenFOAM Programming & Development 6 May 26, 2014 03:26
TVD ... Questioner Main CFD Forum 1 June 7, 2006 09:54
4th and 5th Order TVD Runge-Kutta Methods saygin Main CFD Forum 2 January 30, 2006 12:45
TVD TVD Main CFD Forum 0 November 17, 2005 12:25
TVD Schemes Matt Umbel Main CFD Forum 1 January 25, 2000 05:21


All times are GMT -4. The time now is 09:26.