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

Lift and Drag ???

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 15, 2010, 13:58
Default Lift and Drag ???
  #1
New Member
 
Niall
Join Date: Jun 2010
Posts: 9
Rep Power: 7
Yogibear is on a distinguished road
Hi Everyone

Im trying to make star ccm+ output the lift and drag from a NACA 0012 wing between 0 - 18 degrees. Im strugling with it a bit ive had it all working with pressures but need drag and lift.

Ive been through the help and tutorial section but dont seam to be able to get the right settings to even select lift and drag.

The physics Ive been using are as following
K-Epsilon Turbulence
Turbulent
Constant Density
Steady
Segragated Flow
Gas
Stationary
Three Dimensinal

Please Bear with me as im basically teaching myself how to use the software for uni.
Thanks
Yogibear is offline   Reply With Quote

Old   June 15, 2010, 19:08
Default
  #2
f-w
Senior Member
 
Join Date: Apr 2009
Posts: 129
Rep Power: 8
f-w is on a distinguished road
You need to search the help file for REPORTS. If you want absolute forces, there's a "Force" report. If you want coefficients, there's a "Force coefficient" report.

Whichever report you go with, be careful with the "direction" specification, and all the reference values.
f-w is offline   Reply With Quote

Old   June 17, 2010, 16:24
Default
  #3
New Member
 
Brendan Smoker
Join Date: May 2010
Posts: 7
Rep Power: 7
BrenS is on a distinguished road
I recently completed a similar analysis and found a great tutorial in STAR-CCM+ that clearly explained the proper procedure. To access the tutorial I went to Help->Help (F1)->Search and then typed in "airfoil tutorial." The tutorial is called "Transonic Flow over an Airfoil" and outlines a step-by-step procedure for solving, reporting, and visualizing the flow solution over an airfoil. It also explains how to convert the imported mesh into 2D which is a significant time saver for this sort of analysis. Good luck!
BrenS is offline   Reply With Quote

Old   June 17, 2010, 17:01
Default
  #4
New Member
 
Niall
Join Date: Jun 2010
Posts: 9
Rep Power: 7
Yogibear is on a distinguished road
Hay
Thanks for the replies folks. I did find that tutorilal as well and have been having a look at it. However my wing is in 3d and for the project im ment to be keeping it in 3d. Think ive got the processing power to do it in 3d just not sure how to. It seams far to complicated for some reason.
Yogibear is offline   Reply With Quote

Old   June 20, 2010, 10:11
Default physics model
  #5
New Member
 
Arun
Join Date: Jun 2010
Posts: 10
Rep Power: 7
arunjingade is on a distinguished road
hiya,

I think you should use "coupled flow" not "segregated flow". it doesnt make much difference because coupled flow is used for high speed application (if I am not wrong) but coupled flow is more accurate.


Cheers,

Arun
arunjingade is offline   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
Correct lift but wrong pressure drag - possible? zx Main CFD Forum 4 July 27, 2007 23:38
Lift and Drag Coefficients Reliability Luis FLUENT 2 December 27, 2005 15:45
Drag and Lift Daniel Fisher Phoenics 2 April 8, 2005 03:51
drag and lift coefficient No CD-adapco 5 July 13, 2004 10:21
Fluid mechanics / drag & lift Jamcam Main CFD Forum 0 October 31, 2002 05:39


All times are GMT -4. The time now is 00:57.