II Year B.Tech. AE - I Sem    L T/P/D C
4  -/-/-    4
(A30103) MECHANICS OF FLUIDS

Aim & Objectives:

The student will gain insight into a number of potentially useful phenomena involving movement of fluids. He/she will learn to do elementary calculations for engineering application of fluid motion. This course also prepares the student for more advanced courses such as Aerodynamics - I & - II.

UNIT - I

Fluid Properties: Density, specific weight, specific gravity, surface tension & capillarity, Newton's law of vicosity, incompressible & compressible fluid, numerical problems.

Hydrostatic forces on submerged bodies: Pressure at a point, Pascal's law pressure variation with temperature and height, Center of pressure on vertical, inclined and curved surfaces.

Manometers -  simple and differential manometers, inverted manometers, micro mano meters, Pressure gauges and numerical problems. Buoyancy - Archimedes's Principle, Metacenter, meta centric height calculations.

UNIT - II

Fluid Kinematics: Stram line, path line, strak line, stream surface, stream tube, classification of flow: steady, unsteady, uniform, non uniform, laminar, turbulent flows. One dimensional approximation, examples of real 1-D flows two dimensional approximation, 2-D flow in wind tunnel, continuity equations for 1-D and 2-D flows both compressible and incompressible, stream function for two dimensional incompressible flows. Vorticity, irrotational flow, Velocity potential function.

UNIT - III

Fluid Dynamics: Surface & body forces, substantive derivative, local derivative and convective derivative, momentum equation, Euler equation, Bernoulli's equation, Phenomenological basis of Navier-Stokes equation, Introduction to vortex flows.

Statement of Buckingham's  - theorem, Similarity parameters: Reynolds number, Froude number, Concepts of geometric, kinematic and dynamic similarity, Reynolds number as a very approximate measure of ratio of Inertia Force and Viscous Force, flow measurements: pressure, velocity and mass flow rate, viscosity, Pitot-static tube, venturi meter and orifice meter, viscometers.

UNIT - IV

Boundary Layer: Introductory concepts of boundary layer, Large Reynolds number flows and Prandtl's boundary layer hypothesis, Qualities description of Boundary layer thickness and velocity profile on a flat plate and flow around submerged objects. Pressure drag and skin friction drag.

UNIT - V

Pipe flow: Reynolds experiment, Darcy's equation, major and minor losses in pipes and numerical problems.

Exact solutions of Navier stokes equations, flow between parallel plates, flow through long tubes, Fully developed flow, turbulent flow, variation of friction factor with Reynolds number, Moody's chart.

TEXT BOOKS:

1. Engineering Fluid Mechanics - K.L. Kumar, S. Chand & Co.
2. Introduction to Fluid Mechanics and Fluid Machines - S.K. Som and G. Biswas.

REFERENCES:

1. Fluid Mechanics - Frank M and White, Mc - Grawhill.
2. Fluid Mechanics - Fox and Mc Donald.
3. Fluid Mechanics - E. Rathakrishnan.

Outcomes: