# Basic Concepts of Fluid Statics | Fluid Statics | Fluid Mechanics | By Ashutosh Nautiyal

What is Fluid Statics?Fluid Statics is the branch of Fluid Mechanics that studies the fluids at rest and the pressure in a fluid or exerted by a flui

## Describe Fluid Statics.

• Fluid Statics is the branch of Fluid Mechanics that studies the fluids at rest and the pressure in a fluid or exerted by a fluid on an immersed body.

• It is also called Hydrostatics.

## Define the Pressure of a Fluid.

• When a fluid is contained in a vessel, it exerts a force on the sides and bottom of the vessel due to its weight.

• The direction of pressure is always at a right angle to the surface.

• It is generally denoted by P.

• Its SI unit is Newton (N).

## Describe the Intensity of Pressure.

• The pressure exerted by the liquid per unit area is called the Intensity of Pressure.

• It is also known as Unit pressure or Specific pressure.

• It is denoted by p.

• p= P/A

• where p = Intensity of Pressure

• P = Pressure acting on a surface

• A = area of the surface on which the pressure is acting

• The SI unit of Intensity of Pressure is N/m2.

• Generally, the Intensity of Pressure is referred to as Pressure.

## Derive the formula for the Pressure Head of a Liquid.

• Suppose a tank of base area A filled with liquid up to height h. Pressure Head of a Liquid

• The total pressure of the liquid on the base of the tank (P) is:-

• P = Specific weight of liquid * Volume of liquid

• P = wAh

• The intensity of pressure (p) is:-

• p = P/A

• p = wAh/A

• p = wh

• Since, p = wh. This shows that the intensity of pressure varies with the depth of liquid since the specific weight of the liquid is constant.

• When the pressure is expressed in terms of the height of the liquid, then, that height of the liquid is referred to as the pressure head.

• Pressure head (h) = p/w

• It is generally measured in mm or cm or m of the liquid column.

*Self Typed
*Source- Books, Internet, Self-Analysis

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