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

Aerofoils - Why do most CFD outputs give Cp rather than Cl or Cd?!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 22, 2009, 08:50
Default Aerofoils - Why do most CFD outputs give Cp rather than Cl or Cd?!
  #1
New Member
 
Kris
Join Date: Dec 2009
Location: Coventry
Posts: 2
Rep Power: 0
kaywarner is on a distinguished road
Afternoon all,

As you might have guessed i'm brand new to CFD, so forgive the stupidity of this one;

Why do the majority of CFD outputs you find on, say a google image search, give a coefficient of pressure over an aerofoil rather than something usefull like a coefficient of lift or drag?

If anyone could help iron this for me it would be a great help.

Many thanks for reading the post,

Kay
kaywarner is offline   Reply With Quote

Old   December 22, 2009, 09:25
Default
  #2
New Member
 
Join Date: May 2009
Posts: 28
Rep Power: 9
walli is on a distinguished road
Quote:
Originally Posted by kaywarner View Post
Why do the majority of CFD outputs you find on, say a google image search, give a coefficient of pressure over an aerofoil rather than something usefull like a coefficient of lift or drag?
Plotting lift or drag coeffs over an airfoil would be quite boring and give no further insight. A lift or drag coefficient is an integrated (global) coefficient for a given geometry, whereas a pressure coefficient can be evaluated locally. It only makes sense to do plots of those coefficients for varying geometries, e.g. plot cD vs. an airfoil parameter.
walli is offline   Reply With Quote

Old   December 22, 2009, 10:22
Default
  #3
New Member
 
Kris
Join Date: Dec 2009
Location: Coventry
Posts: 2
Rep Power: 0
kaywarner is on a distinguished road
Thats excellent - thanks so much.
kaywarner is offline   Reply With Quote

Reply

Tags
aerofoils, cfd, coefficient of lift, drag, pressure

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
i got to give a seminar on cfd adhiraj singh rathore Main CFD Forum 3 March 18, 2008 02:36
STAR-Works : Mainstream CAD with CFD CD adapco Group Marketing CD-adapco 0 February 13, 2002 13:23
CFD JOBS and Expected Salary.... Noel Harrison Main CFD Forum 11 November 22, 2000 08:15
ASME CFD Symposium, Atlanta, 22-26 July 2001 Chris R. Kleijn Main CFD Forum 0 August 1, 2000 10:07
public CFD Code development Heinz Wilkening Main CFD Forum 38 March 5, 1999 12:44


All times are GMT -4. The time now is 23:30.