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

Desperate ! Fan model !!!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 30, 2003, 01:31
Default Desperate ! Fan model !!!
  #1
Boris
Guest
 
Posts: n/a
Following is the problem I encountered

In a complex air flow system ( one in several out with complex geometry), there is a powerful fan ( pressure jump 10000 Pa) which drives the air flow. A pressure jump model of fan was used in the previous simulation to predict the air flow and pressure distribution without the consideration of temperature variation at that time. Now, I want to rerun the model with the activation of energy equation so that I can predict the air temperature variation along the flow path. For this purpose, the air density is changed to ideal gas. After reruning the model, I get a converged solution. However, I find that the temperature ( and enthalpy ) drops after the fan, although the static pressure and air density jump after the fan. In fact, the temperature (and enthalpy also) is expected to rise due to the compression of the fan. So, I suspect that the pressure jump model of fan may not suit to the compressible flow where the density and energy variations are considered. Please advise how to rectify this problem to produce correct results.

Please help. Thank you in advance.

  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
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
UDF for fan model zhaoh FLUENT 4 February 20, 2012 06:31
How to model an internal fan hsieh OpenFOAM Running, Solving & CFD 4 August 24, 2008 08:02
How to model a fan in Fluent davide corrente FLUENT 2 July 26, 2007 16:33
Model Axial Fan Chien-Chi Chao CD-adapco 1 February 1, 2001 23:13


All times are GMT -4. The time now is 02:39.