A special case of the Navier-Stokes Equation can be used to determine the frictional force (called the drag force) arising from the viscosity of a fluid on a spherical body.
Definition
Formula
Drag force on a spherical body in a Fluid
Terms
- = Drag force onto a spherical body. Being a frictional force, it opposes the direction of velocity, i.e. (in )
- = Coefficient of Viscosity of the fluid (in )
- = Radius of spherical body (in )
- = Velocity (in )
Implications
Can be solved for :
#todo full derivation!