CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Momentum source term definition in FLUENT

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 22, 2016, 10:00
Default Momentum source term definition in FLUENT
New Member
Taaresh Taneja
Join Date: Jun 2016
Posts: 1
Rep Power: 0
Taaresh is on a distinguished road
Hello all!

I have been trying to define a momentum source (body force) term by extracting a cell zone in FLUENT. The objective is to check the downstream velocity profile because of this source term in the y direction (which is perpendicular the the direction of flow). Now, I extracted a cell zone with volume V and used a force F to get the body force, say Fb. On doubling the force F, the velocity changes are significant however if I keep the same force and extract only half the volume and accordingly give the body force term, there is hardly any change in downstream velocity.

In both the cases, I have doubled the body force as compared to the base case. First by doubling the force and second by halving the volume. So ideally the results should be the same, right? However I am getting a difference of about 80% in downstream mass weighted average velocity.

Can someone please help me with this?

Thanks in advance
Taaresh is offline   Reply With Quote


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
[] problem when installing foam-extend-1.6 Thomas pan OpenFOAM Installation 7 September 9, 2015 21:53
centOS 5.6 : paraFoam not working yossi OpenFOAM Installation 2 October 9, 2013 01:41
How does fluent handles the momentum source term? QBeast FLUENT 0 April 22, 2013 14:12
DecomposePar links against liblamso0 with OpenMPI jens_klostermann OpenFOAM Bugs 11 June 28, 2007 17:51
momentum source term depending on cell coordinates nikolas FLUENT 0 January 30, 2007 10:00

All times are GMT -4. The time now is 14:22.