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-   -   formula used for drag force? (http://www.cfd-online.com/Forums/main/74528-formula-used-drag-force.html)

kamma April 2, 2010 10:21

formula used for drag force?
 
Hi. I have meshed a car body and solved it in fluent. The solution got converged. I took the value of drag force and drag co-efficient from the report-forces menu. I have taken the projected area also.
Even though both the drag forces and drag co-efficients are displayed there, i liked to find the drag force with the displayed drag co-efficient using the formula Df = Cd*0.5*rho*A*V^2. But the drag force obtained is different from the drag force displayed there. why?....


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