Question

1
1. White short notes
- Ideal and real fluid
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Answer 1

Answer

Ideal fluid

An ideal fluid is a fluid that has several properties including the fact that it is:

• Incompressible – the density is constant

• Irrotational – the flow is smooth, no turbulence

• Nonviscous –(Inviscid) fluid has no internal friction ( η = 0)

Ideal fluid do not actually exist in nature, but sometimes used for fluid flow problems.

2.Real fluid: Fluid that have viscosity(μ > 0) and their motion known as viscous flow.

All the fluids in actual practice are real fluids.

Fluid dynamics:

we use ideal fluid in 2 equations :

1.Continuity equation

2.Bernoulli equation

3. Newtonian Fluids:

A real fluid in which the shear stress is directly proportional to rate of shear strain (or velocity gradient).

4. Non-Newtonian Fluid:

A real fluid in which the shear stress is not proportional to the rate of shear strain.

5. Ideal Plastic Fluid:

A fluid in which shear stress is more than the yield value and shear stress is proportional to the rate of shear strain (or velocity gradient).

Answer 2

Answer:

ideal fluid is the correct answer....