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

Zero Coefficient of Lift Problem

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

LinkBack Thread Tools Search this Thread Display Modes
Old   February 25, 2007, 11:48
Default Zero Coefficient of Lift Problem
Posts: n/a
Hi, I'm testing an airfoil at small angles of attack (alpha = 1,2,3,4,5) inside a antisymmetric tunnel, with the inlet 4D upstream from foil, outlet 8D downstream. I specify the proper reference variables and set up the force monitors to monitor lift and drag (with the proper force vectors), however in my results my lift coefficient is consistently equal to zero while I get non-zero results for the drag coefficient (I plot the calculated lift coefficient along the iterations and it stays zero).

I get a zero lift coefficient regardless of whether I run a steady analysis with inviscid, laminar, or turbulent models.

I do get non-zero lift coefficients when I did the analysis of the foil with farfield boundaries.

Do you know what the problem may be?

Thanks for any help you can offer.

  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
lift coefficient morteza08 Main CFD Forum 4 November 24, 2011 04:51
lift coefficient from Ferrari Testarossa mp199 Main CFD Forum 0 August 31, 2011 03:02
Fluent Good Lift coefficient BAD drag coefficient Rif Main CFD Forum 4 March 9, 2010 10:52
The lift force coefficient in bubbly flow Kai Yan Main CFD Forum 1 November 4, 2008 13:54
Plotting of lift coefficient vs angle of attack?? John Main CFD Forum 1 August 18, 2003 09:31

All times are GMT -4. The time now is 16:25.