CFD Online Logo CFD Online URL
Home > Forums > FLUENT

definition lift and drag coefficient

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

LinkBack Thread Tools Display Modes
Old   April 16, 2010, 04:10
Default definition lift and drag coefficient
New Member
Wieland De Lepeleire
Join Date: Jan 2010
Posts: 18
Rep Power: 9
Wieland is on a distinguished road
I've read the Fluent manual which told me that force coefficients are defined as follows:

"In addition to the actual pressure, viscous, and total forces, the associated force coefficients are also computed for each of the selected wall zones, using the reference values (as described in this section in the separate User's Guide). The force coefficient is defined as force divided by 0.5*rho*v^2*A, where rho, v, and A are the density, velocity, and area."

In my setup I want to export the drag and lift force on one subdomain of the object in function of time (more precise: I want the forces on a mirror, whereas my mesh contains a mirror mounted on a plate).
With this thread I would like to make sure I just need to plot the drag/lift coefficients on the mirror and multiply these values with 0.5*rho_ref*v_ref^2*A_ref, so the area of the mirror shouldn't be used, right?
Wieland is offline   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
lift & drag coefficient on airfoil n. natik FLUENT 8 March 31, 2015 19:02
Fluent Good Lift coefficient BAD drag coefficient Rif Main CFD Forum 4 March 9, 2010 11:52
Drag coefficient & Lift coefficient?? mehrdadeng CFX 15 December 9, 2009 22:49
Automotive test case vinz OpenFOAM Running, Solving & CFD 98 October 27, 2008 09:43
drag and lift coefficient No Siemens 5 July 13, 2004 10:21

All times are GMT -4. The time now is 05:23.