Fluid is a substance that flows under the action of shearing force.
If fluid is at rest, then force on it are in balance.
Classification of fluid
1. Ideal fuid
2. Real fluid
3. Newtonian fluid
4. Non-Newtonian fluid
5. Ideal plastic fluid
Explaination:
*Ideal fluid:
-This fluid is incompressible and possesses no viscosity. Such fluid is only an imaginary fluid. All existing fluids have some viscosity.
*Real fluid:
A fluid that possesses viscosity is known as a real fuid.
In actual practice, all fluids are real fluid.
*Newtonian fluid:
A real fluid in which the shear stress is directly proportional to the rate of shear strain is calles Newtonian fluid.
*Non-Newtonian fluid:
A real fluid in which the shear stress is not proportional to the rate of shear stress is called non-Newtonian fluid.
*Ideal plastic fluid
A fluid in which the shear stress is more than the yield value and the shear stress is proportional to the rate of shear strain is calles ideal plastic fluid.
Shear strain =velocity gradient
0 Comments