Home Physics Mechanical Properties of Fluids

Mechanical Properties of Fluids

Pressure due to a fluid column; Pascal's law and its applications (hydraulic lift and hydraulic brakes), effect of gravity on fluid pressure. Viscosity, Stokes' law, terminal velocity, streamline and turbulent flow, critical velocity, Bernoulli's theorem and its applications. Surface energy and surface tension, angle of contact, excess of pressure across a curved surface, application of surface tension ideas to drops, bubbles and capillary rise.

Capillary Rise

Capillary Rise

The contact angle between water and glass is acute. Thus the surface of the water in the capillary is concave. This means that there...
Application of surface tension

Application of surface tension

A liquid air interface has energy, so for a given volume, the surface with minimum energy is the one with the least area. The...
Surface Tension

Surface Tension

Surface tension is a force per unit length (or surface energy per unit area) acting in the plane of the interface between the liquid...
Bernoulli’s Theorem

Bernoulli’s Theorem

If an ideal liquid is flowing in streamlined flow then total energy, i.e., sum of pressure energy, kinetic energy and potential energy per unit...
Flow of Liquid

Flow of Liquid

Streamline Flow The flow of liquid in which each of its particle follows the same path as followed by the proceeding particles, is called streamline...
Stokes’ Law and Terminal velocity

Stokes’ Law and Terminal velocity

According to Stokes’ law, the backward viscous force acting on a small spherical body of radius r moving with uniform velocity v through fluid...
Viscosity

Viscosity

Viscosity is the property of fluid by virtue of which an internal force of friction comes into play when a fluid is in motion...
Hydraulic Machines

Hydraulic Machines

The external pressure is applied on any part of a fluid contained in a vessel, it is transmitted undiminished and equally in all directions....
Atmospheric Pressure

Atmospheric Pressure

The pressure of the atmosphere at any point is equal to the weight of a column of air of unit cross sectional area extending...
Variation of Pressure with Depth

Variation of Pressure with Depth

Consider a fluid at rest in a container. In Fig.1 point 1 is at height h above a point 2.The pressures at points 1...