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

Dynamic similarity and coefficient

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 7, 2007, 00:58
Default Dynamic similarity and coefficient
  #1
KB
Guest
 
Posts: n/a
Hello,

I have some questions regarding dynamic similarity and how to make use of cd/cl from my cfd code results.

Supposed I do a simulation of an airfoil at Re=1000. The NS eqn have been non-dimensionalised and the chord is 1 unit, u inlet (infinity) is also 1 unit. Length has been non-dimensionalised by meter and time by second.

For this simple example, assume the cl/cd I get at 5deg AoA are 1.5 and 0.05.

Now I would like to find out how much lift/drag force I'll get for an actual test model, neglecting 3d effects. Its

u infinity is 5m/s, chord at 0.05m, width=0.15m. of cos, Re=1000.

Force=(cd or cl)*rho*vel^2*area. To compute lift, F(l)= 1.5*1.2*(5*5)*0.15*.05. Newton. Is that correct?

Thanks

  Reply With Quote

Reply


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



All times are GMT -4. The time now is 03:43.