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

Implicit gradient scheme, fvm::grad() ??

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 26, 2012, 10:03
Default Implicit gradient scheme, fvm::grad() ??
  #1
New Member
 
Tian Tang
Join Date: Jun 2012
Location: Copenhagen, Denmark
Posts: 18
Rep Power: 13
tiat is on a distinguished road
hi, dear all,

i would like to ask a question about whether there is possiblity to have an implicit gradient scheme.

I am solving the momentum equation with pressure coupling, and i would like to use the block matrix solver. fvm::grad(p) seems necessary for constructing the coupling coefficients in the block. i searched this in the forum, in 2006 this question has been asked and the answer was no. I am very curious about what is the situation now? could anyone give me some helps?

Thanks ahead!
tiat is offline   Reply With Quote

Old   July 31, 2012, 17:06
Default
  #2
Member
 
Haomin Yuan
Join Date: Jan 2012
Location: Madison, Wisconsin, USA
Posts: 59
Rep Power: 14
yhaomin2007 is on a distinguished road
I am afraid you have to write a fvm::grad yourself, this function is not available in latest official version of OF.
yhaomin2007 is offline   Reply With Quote

Old   August 1, 2012, 04:24
Default
  #3
New Member
 
Tian Tang
Join Date: Jun 2012
Location: Copenhagen, Denmark
Posts: 18
Rep Power: 13
tiat is on a distinguished road
Quote:
Originally Posted by yhaomin2007 View Post
I am afraid you have to write a fvm::grad yourself, this function is not available in latest official version of OF.
hi Haomin,

thanks for your reply
Yes, i've just figured out no implicit gradient operator availble in openfoam yet, but there are some researchers did manage to solve the pressure coupling implicitly. i found this interesting paper in the 7th OpenFOAM Workshop by L. Mangani , M. Darwish2 and M. Buchmayr. the title is A fully integrated pressure based coupled solver using block GAMG acceleration. i'm reading the related reference at present, hopefully i could find the way out.

regards,
Tian
tiat is offline   Reply With Quote

Old   July 6, 2014, 14:40
Default
  #4
New Member
 
Xiangyu Gao
Join Date: Sep 2013
Location: West Lafayette, IN, USA
Posts: 29
Rep Power: 12
gxy200992243 is on a distinguished road
Hi, Tian

Have you figured out how to express grad() implicitly? I am now facing the same problem..........

Regards,
gxy200992243 is offline   Reply With Quote

Old   October 2, 2014, 05:41
Default
  #5
Member
 
Join Date: Nov 2012
Posts: 83
Rep Power: 13
Henning86 is on a distinguished road
fvm::grad is available in extended 3.1
Henning86 is offline   Reply With Quote

Old   December 4, 2015, 11:56
Default
  #6
Member
 
james wilson
Join Date: Aug 2014
Location: Orlando, Fl
Posts: 39
Rep Power: 11
jameswilson620 is on a distinguished road
Quote:
Originally Posted by tiat View Post
hi Haomin,

thanks for your reply
Yes, i've just figured out no implicit gradient operator availble in openfoam yet, but there are some researchers did manage to solve the pressure coupling implicitly. i found this interesting paper in the 7th OpenFOAM Workshop by L. Mangani , M. Darwish2 and M. Buchmayr. the title is A fully integrated pressure based coupled solver using block GAMG acceleration. i'm reading the related reference at present, hopefully i could find the way out.

regards,
Tian
Would you kindly send me this paper as I cannot find it?

James
jameswilson620 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
2D Implicit HLLC scheme harish_0689@ Main CFD Forum 2 January 21, 2012 14:22
Is there a corrected Gauss gradient scheme? bigphil OpenFOAM 1 November 27, 2011 09:54
Is it feasible to apply implicit scheme in LES EagleGao Main CFD Forum 2 October 24, 2011 15:04
time_step, implicit scheme, number of iterations Isa Main CFD Forum 3 May 11, 2006 13:27
Komogrov time scale and implicit scheme for LES Li Yang Main CFD Forum 1 January 17, 2004 02:13


All times are GMT -4. The time now is 12:32.