Modeling Coefficient of Drag 1

[markmc]

I am an ME, and I haven't attempted to model airflow since college. I have a design problem that involves a small automotive trailer. I am looking for recommendations on a relatively simple piece of software to model airflow. I do not need a high degree of accuracy, rather, I would like to arrive at a coefficient of drag for simple comparitive geometries. I hope not to have to relearn the field of Fluid Dynamics.
Suggestion?
Mark

 

[sciguyjim]

Mark,
Maybe you'll get some help at the site below. Good luck.

http://www.bgsoflex.com/airdragchart.html