Fluid Mechanics & Hydraulics — Summer 2021

Define fluid, Specific gravity, Mass density

Define viscosity and differentiate between kinematic and dynamic viscosity its ap

pDle fine surface tension. Prove the relationship between surface tension and inside a droplet of liquid in excess of outside pressure is given by p = 4σ/d.

Describe the terms atmospheric , absolute, gage and vaccum pressure with sketch

Classify various manometers

State Pascal’s law and give some examples where this principle is applied

Explain hydrostatic paradox with suitable demonstration

Classify fluid flows.

The velocity potential function is given by ϕ = 5(x2– y2). Calculate the velocity components at the point (4, 5)

Explain flow net & Reynolds experiment.

Explain the term ‘Total Pressure and Centre of Pressure’.

Derive Euler’s equation of motion along a stream line.

Ahorizontal pipe carrying water of 20 cm diameter converges to 10cm diameter. If the pressures at two sections are 450 KN/m2 and 150 KN/m2 respectively. Compute the rate of flow of water.

Discuss stability of submerged and floating bodies with neat sketches

Explain the different hydraulic & mouth piece.

Derive the expression for discharge over the (1) Rectangular notch and (2) Triangular notch

Explain the phenomenon of water hammer

What is pitot-tube? How the velocity at any point is determined with the help of pitot-tube.

What is venturimeter. Derive an expression for the discharge Through a venturimeter.

Define continuity equation & derive it.

What are repeating variables? How are they selected for dimensional analysis?

Derive an expression for the loss of head due to friction in pipes.

Explain viscous flow.

Explain the terms. specific energy, critical depth, critical velocity, alternate depth

State Buckingham’s π theorem. Why it is considered superior over Rayleigh method for dimension analysis.