CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Calculation of Coefficient of Drag of simplified car model.

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

LinkBack Thread Tools Display Modes
Old   July 17, 2015, 02:45
Default Calculation of Coefficient of Drag of simplified car model.
New Member
G Shankar
Join Date: Mar 2014
Location: Tamilnadu, Chennai, India
Posts: 7
Rep Power: 3
gshankarau is on a distinguished road
Hi Friends,
I am trying to analyse the simplified car model of length 410mm in Ansys Fluent 15 and I am fixing the fluid velocity as 14.95 m/s and computational domain dimensions as L=2000mm, W=1200mm, H=1000mm and I calculated reynolds no as 4.207e5 and turbulent intensity as 0.0311 and hydraulic diameter as 1.090.
I had entered the boundary condition for Velocity inlet with above calculated values Turb.intensity, Hy dia, then pressure oulet with K and Epsilon as default values as 1 for both. The result shows [B]Cd value shows 0.16 but the actual Cd value of the model is 0.3, So kindly anyone assist me that where I had done the mistake.
Formulas I had used are
Hy dia=(4*1*1.2)/Perimeter of domain
Kindly anyone reply me as soon as possible.

Thanks in advance.
gshankarau 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
Incorrect Drag and Drag Coefficient for flow over a cylinder ozzythewise Main CFD Forum 8 June 13, 2012 06:24
Pressure drag calculation lc05 Main CFD Forum 2 November 1, 2010 08:50
Drag and Lift coefficient calculation viraj Main CFD Forum 0 February 5, 2010 06:41
Automotive test case vinz OpenFOAM Running, Solving & CFD 98 October 27, 2008 09:43
Warning 097- AB CD-adapco 6 November 15, 2004 05:41

All times are GMT -4. The time now is 09:12.