How do you find the coefficient of viscosity in Stokes?

The ratio of the shearing stress to the velocity gradient is a measure of the viscosity of the fluid and is called the coefficient of viscosity , or = Fx / Av.

What is meant by term coefficient of viscosity state Stokes law?

Solution : Coefficient of viscosity `(eta)`: The viscous force acting tangentially on unit area of the liquid when there is a unit velocity gradient in the direction perpendicular to the flow is defined as ” Coefficient of viscosity”.

What is Stoke’s law derive the relation of coefficient of viscosity by Stokes method?

Stoke’s Law states that the force that retards a sphere moving through a viscous fluid is directly proportional to the velocity and the radius of the sphere, and the viscosity of the fluid.

What is Stokes law derive its formula?

This retarding force acting on a body as it passes through a viscous fluid is directly proportional to the sphere’s velocity, radius, and fluid viscosity. This is Stokes law. This equation of Stokes Law can be given as, \(F = 6 πηrv\).

How coefficient of viscosity is determined?

To determine the coefficient of viscosity of a given viscous liquid by measuring the terminal velocity of a given spherical body. Coefficient of viscosity is used to calculate the viscosity of the liquid.

How do you find the coefficient of viscosity of a liquid?

Dynamic viscosity is related to kinematic viscosity by the equation μ = ρν, where ρ is the density of the fluid. The unit of dynamic viscosity μ is centipoise. If fluid density ρ has the unit of g/cc, then kinematic viscosity ν has the unit of centistoke. Thus, 1 centistoke equals 1 centipoise divided by 1 g/cc.

What is the unit of coefficient of viscosity?

The coefficient of viscosity (η) is the ratio of applied stress to the rate of straining (change of strain with time). It is measured in units of poise; one poise equals one dyne-second per square centimetre.

What is G in Stokes law?

g is the gravitational field strength (m/s2) R is the radius of the spherical particle (m) ρp is the mass density of the particle (kg/m3) ρf is the mass density of the fluid (kg/m3)

What is Stoke’s law in physics?

1 : a law in physics: the frequency of luminescence excited by radiation does not exceed that of the exciting radiation. 2 : a law in physics: the force required to move a sphere through a given viscous fluid at a low uniform velocity is directly proportional to the velocity and radius of the sphere.

What is Stoke’s law of viscosity derive expression for terminal velocity?

Solution : According to stokes law, the backward viscous force acting on a small spherical body of radius r moving with velocity v through fluid of viscosity `eta`is given by ` F = 6 x eta r v`. Terminal velocity is the maximum Uniform velocity of the spherical body moving in a fluid.

What is Stokes law write its condition?

Stokes’ law is a law in physics that states that the force that resists a sphere’s fall in a viscous fluid is directly proportional to the velocity of the sphere, the radius of the sphere, and the viscosity of the fluid.

What is viscosity coefficient of a liquid?

The coefficient of viscosity is a measure of resistance to flow of the fluid. In general, gas viscosity is less than liquid viscosity. The inverse of viscosity is called fluidity [McCain, 1990]. Thus, a fluid with a large viscosity has a low fluidity.