Answer to Question #92096 in Optics for Aimy

Question

What is the coefficient of viscosity?

Answer 1

Viscosity coefficient is defined in two ways:

1) dynamic viscosity of fluid show its internal resistance to flow due to shearing force;

2) kinematic viscosity is a ratio of dynamic viscosity to the density of fluid.

Dynamic viscosity is given by formula:

$η = \frac{F×h}{A×u}$

Dynamic viscosity is measured in

$\frac{N×s}{m^2}$

Kinematic viscosity is given by formula:

$k = \frac{ η }{ρ}$

where η is a dynamic viscosity, ρ is density of fluid

Kinematic viscosity is measured in

$\frac{m}{s^2}$