Elements of Fluid Mechanics — Winter 2021

Mention any three properties of fluids with their relevant units.

Discuss various pressure measurement scales.

Aplate of 0.025mm distant from a fixed plate moves at 60 cm/s require a force of 2 N/m2 to maintain this speed. Determine the fluid viscosity between the plates.

Discuss the classification of fluids based on stress – strain graphs

The pressure intensity at a point in a fluid is 3.924 N/cm2. Find the corresponding height when the fluid used is (a) water (b) oil of specific gravity 0.9

Explain how differential manometer is used for measuring pressure difference across a pipe.

Discus the case of boundary layer formation when a fluid flows over a flat plate.

Detail Skin friction and form friction losses for flow of fluid through a pipe.

Differentiate (a) Laminar and turbulent flow (b) Compressible and Incompressible flow

Derive the equation of discharge for flow of fluid through a Venturimeter.

The diameters of a pipe at sections 1 and 2 are 10 cm and 15 cm respectively. Find the discharge through the pipe if the velocity of water flowing through the pipe at section 1 is 5 m/s. Determine the velocity at section 2.

Discuss the hydraulic coefficients of an orifice?

With a neat diagram discuss the various heads in a Pump.

Define drag. Discuss the various drag effects encountered when fluid flows past a solid object.

What is Cavitation? Mention the disadvantageous effects when cavitation develops in a pipe.

Derive the expression for velocity distribution for the laminar flow of an incompressible fluid through a pipe?

What is Stokes law? With a figure mention the forces acting on a spherical particle when it settles down in a fluid.

With a neat diagram explain the working principle of a rotameter.

Discuss the various cases of form frictional losses for the flow of fluid through a pipe1

Write a short note on flow pattern in agitated vessels.

What are various types of impellers used in industries?

Discuss the various applications of Fluidization.

Mention the significance of Stagnation point and stagnation pressure

What is swirling and how it can be prevented?

What is fluidization and minimum fluidization velocity? Derive an expression for minimum fluidization velocity for flow of fluid through a packed bed.