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-   -   again a 2d car modeling and calculate CD (http://www.cfd-online.com/Forums/ansys/67157-again-2d-car-modeling-calculate-cd.html)

reza79 August 5, 2009 17:30

again a 2d car modeling and calculate CD
 
Hi every body.
I'm working on a project deals with calculating drag coefficient of a car(a 2d model from cross section),
i dont know that where is my mistake that my answer is about 10-20 times smaller than absolute value and is about .015!
first:for calculating CD,should i select all of the car body az an unique body?
second:what should be my boundry condition?
please help me,i'm so confused!
thanks

abrar October 19, 2009 15:13

Do u have the dimensions of the car? use farfield b.c.


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