Viscosity
Viscosity: Overview
This topic covers concepts such as Viscosity of Fluids, Viscous Force, Factors Affecting Viscous Force, Contact-Area of the layers, Velocity Gradient between Layers, Coefficient of Viscosity, SI Unit of Coefficient of Viscosity, Poise, etc.
Important Questions on Viscosity
A spherical ball of radius and density falls freely under gravity through a distance before entering a tank of water. If after entering the water the velocity of the ball does not change, find . The viscosity of water is .

Turbulent flow tends to occur at higher velocities, low viscosity.

What is the difference between viscosity and coefficient of viscosity?

What are the conditions required for turbulent flow?

What is the assumption of the Poiseuille equation for the flow of liquid through a capillary tube?


Which among the following methods are not standard laboratory viscometers?

What happens to the coefficient of viscosity if the temperature increases?


What is Poiseuille's formula deduce it by means of dimensions?

The hydraulic radius Rh is the ratio of the area of the tube to its volume

Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity . What fluid in contact with the upper plate?



Critical velocity is the velocity below which the flow of liquid is _____?

The critical velocity depends on the radius of the earth, mass of the earth and gravitational constant.


In laminar flow, is reynold's number occurs below the critical value?

Motion of particles of the fluid is very orderly in _____.

The fluid that doesn't follow Newton's law of viscosity is called as_____.
