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

Laplacian Schemes

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

Like Tree2Likes
  • 1 Post By msuaeronautics
  • 1 Post By ngj

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 18, 2013, 16:20
Default Laplacian Schemes
  #1
Member
 
Eric Robertson
Join Date: Jul 2012
Posts: 95
Rep Power: 14
msuaeronautics is on a distinguished road
Can someone tell me what term this line refers to in the fvSchemes dictionary?

Code:
laplacian((1|A(U)),p)
In other words, what is A(U) and what does this entire term look like/mean on paper? I understand the vertical bar | is a bitwise operator.
immortality likes this.
msuaeronautics is offline   Reply With Quote

Old   May 18, 2013, 19:02
Default
  #2
Member
 
Eric Robertson
Join Date: Jul 2012
Posts: 95
Rep Power: 14
msuaeronautics is on a distinguished road
I suppose I may have *sort of* solved my own question. Can anyone confirm that this has to do with pressure-velocity coupling- where one would solve Poisson equations for the pressure correction? I consider myself a beginner when it comes to the depths of what's inside the code.
msuaeronautics is offline   Reply With Quote

Old   May 19, 2013, 13:03
Default
  #3
ngj
Senior Member
 
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Copenhagen, Denmark
Posts: 1,900
Rep Power: 37
ngj will become famous soon enoughngj will become famous soon enough
Hallo,

Yes, it is the Laplacian used for the solution to the pressure Poisson equation. The

Code:
(1|A(U))
term is the diffusivity of pressure, and it is the inverse of the diagonal elements in the discretised momentum equation, i.e. the diagonal of the left hand side of the matrix system.

Kind regards

Niels
msuaeronautics likes this.
ngj is offline   Reply With Quote

Old   May 19, 2013, 22:59
Default
  #4
Member
 
Eric Robertson
Join Date: Jul 2012
Posts: 95
Rep Power: 14
msuaeronautics is on a distinguished road
Understood. Thank you.
msuaeronautics 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
second order schemes marine OpenFOAM 67 April 11, 2022 19:19
OpenFOAM Laplacian schemes Chanti OpenFOAM Pre-Processing 1 April 8, 2013 07:44
Laplacian term in SimpleFoam oscar_urri OpenFOAM 1 December 5, 2012 18:26
time stepping schemes for compressible DNS/LES shyamdsundar Main CFD Forum 0 January 15, 2010 00:15
Higher-order bounded convection schemes for pure advection with discontinuity Anthony Main CFD Forum 3 June 13, 1999 03:36


All times are GMT -4. The time now is 02:01.