Fluid is a substance that is capable of flowing. It has no definite shape of its own. It assumes the shape of its container. Liquids and gases are fluids.
Types of Fluids:
Fluids can be classified into four basic types. They are:
- Ideal Fluid
- Real Fluid
- Newtonian Fluid
- Non-Newtonian Fluid
1. Ideal Fluid:
An Ideal Fluid is a fluid that has no viscosity. It is incompressible in nature. Practically, no ideal fluid exists.
2. Real Fluid:
Real fluids are compressible in nature. They have some viscosity.
Examples: Kerosene, Petrol, Castor oil
3. Newtonian Fluid:
Examples: water, air, emulsions
4. Non-Newtonian Fluid:
Fluids that do not obey Newton’s law of viscosity are non-Newtonian fluids.
Examples: Flubber, Oobleck (suspension of starch in water)