Drag Coefficient

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Drag Coefficient

Drag coefficient ( \(C_d\) ) (dimensionless number) expresses a force in the direction of flow due to pressure and surface stress on an object.

Drag Coefficient FORMULA

\( drag \; coefficient  \;=\;   \frac {  2 \; drag \; force } { mass \; density  \;\;x\;\;   velocity^2  \;\;x\;\; area } \)

\(C_d =  \frac {2F_D} {\rho v^2 A} \) 

Where:

\(C_d\) = drag coefficient

\(F_d\) = drag force

\(v\) = velocity

\(\rho\) (Greek symbol rho) = mass density

\(A\) = area

 

Tags: Equations for Coefficient