The friction drag coefficient is used for the characterization of the friction drag which is caused by shear stresses. The friction drag coefficient puts the wall shear stress in relation to the flow velocity of the undisturbed external flow.

Now, imagine the force of air pushing against the car as it … Air Flow Drag, Drag Coefficient Equation and Calculators for various shapes and bodies. The force required to overcome air resistance for a normal family car with drag coefficient 0.29 and frontal area 2 m2 in 90 km/h can be calculated as: Fd = 0.29 1/2 (1.2 kg/m3) ((90 km/h) (1000 m/km) / (3600 s/h))2 (2 m2) = 217.5 N compare car air resistance with car rolling resistance The drag coefficient is a common measure in automotive design as it pertains to …

The velocity may be that of the object through the air (or any other gas) or the air velocity past a stationary object.

­ ­We've just learned that the coefficient of drag (Cd) is a figure that measures the force of air resistance on an object, such as a car.

The drag coefficient (non-dimensional drag) is equal to the drag force divided by the product of velocity pressure and frontal area. The flow velocity is expressed by …

drag coefficient of air