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

Flux calculation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 25, 2002, 00:04
Default Flux calculation
  #1
Jika
Guest
 
Posts: n/a
Hello everybody,

While calculating velocities in finite volume method we use some schemes like upwind, QUICK etc. But to calculate flux across control volume face, simply the average value of the node velocities of the cvs to which the face belongs, are taken. Why a scheme a not adopted to calculate flux?

With regards

jika
  Reply With Quote

Old   June 27, 2002, 07:24
Default Re: Flux calculation
  #2
Alex
Guest
 
Posts: n/a
It depends what kind of grid do you use. If you have staggered grid then you have the exact velocity value on the face. If you have collocated grid you have to interpolate the value between two CVs to which this face belongs. Staggered grids are only good for some primitive geometry with orthogonal lines. Collocated grids are much more flexible.
  Reply With Quote

Old   June 27, 2002, 12:36
Default Re: Flux calculation
  #3
Jim Park
Guest
 
Posts: n/a
I think you mean "colocated," as in all variables for a control volume are located at the same place - Alternatively, forget the control volumes and say colocated variables are located at the nodes of the mesh.

"Collocation" is a mathematical term, and "collocated variables" are operated on in "collocation."
  Reply With Quote

Old   June 27, 2002, 23:39
Default Re: Flux calculation
  #4
Jika
Guest
 
Posts: n/a
Thank you.
  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
calculation of wall heat flux in CHT richard CFX 1 July 23, 2009 09:00
Flux calculation in vertex-centered finite volume. Martin Main CFD Forum 3 June 4, 2008 10:04
Error in flux at Fluentīs mixing plane calculation ales FLUENT 0 February 9, 2005 05:48
Warning 097- AB CD-adapco 6 November 15, 2004 05:41
Heat Flux Calculation under REPORTS Alberto Schroth FLUENT 0 May 16, 2000 08:19


All times are GMT -4. The time now is 04:09.