معادلة هاجين بوزاي

Hagen-Poiseuille Equation

[Sperling-493]

is (shear) viscosity. The word shear is put in paranthesis because I never saw it used until I started reading an adhesion text.

is the radius of the capillary tube of the viscometer.

is the pressure drop

is the time it takes for a volume of liquid, , to flow through a capillary of length, .