Drag coefficient

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In fluid dynamics, the drag coefficient (commonly denoted as: c d {\displaystyle c_{\mathrm {d} }} , c x {\displaystyle c_{x}} or c w {\displaystyle c_{\rm {w}}} ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water. It is used in the drag equation in which a lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag. The drag coefficient is always associated with a reference area. With the exception of spheres it is also associated with the orientation of the object relative to the direction of the flowing fluid. The drag coefficient...

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