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

Great lift coefficients but negative drag coefficient?!

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 28, 2011, 13:57
Default Great lift coefficients but negative drag coefficient?!
New Member
Join Date: Nov 2011
Posts: 1
Rep Power: 0
nez is on a distinguished road
Hi as the title suggests I am having trouble with my drag coefficients with varying alpha. I am modelling a naca 2412 in 2D using a c-grid style mesh which shows no errors during checks. I am using the coupled solver,Green-guass cell based, PRESTO! pressure, and second order Momentum. I have also changed my relaxation parameters to both .09 to avoid oscillation. I do not understand how I can have such accurate lift coefficients but horrible drag coefficients. Thanks in advance.
nez is offline   Reply With Quote


drag coefficient, lift coefficient, troubleshooting

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
[Other] mesh airfoil NACA0012 anand_30 OpenFOAM Meshing & Mesh Conversion 13 March 7, 2022 17:22
[blockMesh] BlockMesh FOAM warning gaottino OpenFOAM Meshing & Mesh Conversion 7 July 19, 2010 14:11
Automotive test case vinz OpenFOAM Running, Solving & CFD 98 October 27, 2008 08:43
[blockMesh] Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Meshing & Mesh Conversion 10 April 2, 2007 14:00
drag and lift coefficient No Siemens 5 July 13, 2004 10:21

All times are GMT -4. The time now is 02:11.