Mechanical properties pf fluids

        Mechanical     properties of fluids

Chemical property - A fluid is a substance that can flow it ultimately consume the shape of the containing vessel in which it contain. 

Characteristics of fluids

1. The atoms Or molecules in a fluid are arranged in a random manner. 

2. Fluids does not have young's modulus. 

3. Fluid does not have modulus of rigidity. 

4. Fluid has no definite shape of it's own it ultimately assumes the shape of the containing vessels. 

Difference between liquid and gases

Note 1 

The bulk modulus for liquid is greater than gases because they are less Compressible with respect to gas. 

Thrust of a liquid

The net force exerted by a liquid on any surface in contact with it is called thrust. 

Note

As thrust is a force, so it's SI unit is N. 

Pressure - the pressure at a point on a surface is the thrust acting normally around that point. if F be the force acts normally over A than, the pressure is given as 

P = F/A

Note 1

It is a scalar quantity - there is no particular sense of direction of pressure exerted by the fluid on the surface contact with it. 

Example

When a fluid contains in a vessel it's molecules randomly oriented in all direction and exerts thrust on the walls of the vessels.                              In term molecule exerts  pressure on the walls which has no particular direction. 

Note 

Pressure is the internal property of fluids. 

Units - N/m×m

Dimension