CFD Online Logo CFD Online URL
Home > Forums > CFX

Modeling a fan with a momentum source

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

LinkBack Thread Tools Display Modes
Old   November 20, 2002, 06:21
Default Modeling a fan with a momentum source
Pascale Fonteijn
Posts: n/a
Hi guys,

I would like to model the flow between two rooms induced by a fan. To reduce the complex geometry of the fan, I would like to use a momentum source. I could use a source term for only the normal velocity but then the rotational nature of the flow is completely ignored. Does any one have experience with implementing a momentum source that generates a rotational flow which is more or less comparable to the outflow of a fan...

Thank you all, Pascale.
  Reply With Quote

Old   November 20, 2002, 11:57
Default Re: Modeling a fan with a momentum source
Posts: n/a
Set three momentum sources along the x and y and z directions. You could set them both as a fonction of your radius and angular location for more realism.
  Reply With Quote

Old   November 21, 2002, 17:33
Default Re: Modeling a fan with a momentum source
Pascale Fonteijn
Posts: n/a
Dear Holidays,

I already tried that option. I know how the desired velocities profiles look like but the translation to the momentum sources is difficult because the resulting velocities influence these sources. By trial and error you can get somewhere but I never get it right within 25%.

  Reply With Quote


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
momentum source term zwdi FLUENT 14 June 27, 2017 15:40
OpenFOAM on MinGW crosscompiler hosted on Linux allenzhao OpenFOAM Installation 127 January 30, 2009 20:08
DxFoam reader update hjasak OpenFOAM Post-Processing 69 April 24, 2008 01:24
modeling a pump as momentum source Priscila CFX 4 June 6, 2007 10:08
UDFs for Scalar Eqn - Fluid/Solid HT Greg Perkins FLUENT 0 October 11, 2000 03:43

All times are GMT -4. The time now is 10:01.