CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Discretization of momentum equation query

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 20, 2011, 09:38
Default Discretization of momentum equation query
  #1
siw
Senior Member
 
Stuart
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 731
Rep Power: 25
siw will become famous soon enough
Hi,

In the CFX-Solver Theory Guide Eq. 9.2 gives the PDE momentum equation. Eq. 9.5 then gives the same equation but in integral form. Why does the integral form pressure term have a subscript J? Should this be a subscript I instead as in the PDE form?

Then in the discretized momentum equation Eq. 9.8 why does the pressure term not have a minus sign? Also the subscript has changed back to an I, which I think is correct. But is it?

Thanks.
siw 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
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 07:27
Derivation of Momentum Equation in Integral Form Demonwolf Main CFD Forum 2 October 29, 2009 20:53
Momentum equation discretization in rhoSimpleFoam mighelone OpenFOAM Running, Solving & CFD 0 October 16, 2007 05:51
momentum equation (Normal to wall) kk Main CFD Forum 0 July 3, 2006 00:13
momentum equation (Normal to wall_ kk Main CFD Forum 0 July 3, 2006 00:10


All times are GMT -4. The time now is 10:25.