Anna University , Chennai

Department of B.E-Aeronautical Engg , B.E Mechanical Engg , B.E Automobile Engg

Third Semester

CE6451 Fluid Mechanics and Machinery

(Regulation 2013 )

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content:

UNIT-1

PROPERTIES OF FLUIDS

Fluid mechanics

Fluid statics

Fluid kinematics

Fluid dynamics

Density or mass density

Specific weight or weight density

Specific volume

Specific gravity or relative density

Viscosity

Kinematic viscosity

Objectives

FLUID PROPERTIES AND FLOW CHARACTERISTICS

Compressibility and bulk modulus

Cohesion

Surface tension

Hollow surface

Liquid jet

Capillarity

Expression for capillary rise

Expression for capillary fall

Vapour pressure and cavitation

KINEMATICS OF FLOW AND IDEAL FLOW

Kinematics

Two methods

1. Lagrangian methods

2. Eulerian method

Types of fluid flow

1. Steady and unsteady flow

2. Uniform and non-uniform flow

3. Laminar and tubulant flow

4. Compressible and incompressible flow

5. Rotational and irrotational flow

6. One, two and three-dimensional flows

Continuity equation

Problems

Basic equation of compressible flow

1. Continuity equation

2. Bernoullis equation

3. Momentum equation

4. Equation of state

Assumption

Application

Problems

Control volume

UNIT-2

FLOW THROUGH CIRCULAR CONDUITS

Flow of viscous fluid through circular pipe

Hagen poiseuille formula

Hydraulic gradient and total energy line

Flow through pipe

1. Laminar flow

2. Turbulent flow

Loss of energy in pipes

Energy losses

1. Major energy

2. Minor energy

Darcy-weisbach equation

Problems

Reynold’s number

Loss of head due to sudden enlargement

Loss of head due to sudden construction

Loss of head due to an obstruction in a pipe

Flow through pipe in series

Boundary layer flow

Moody diagram

Turbulent boundary layer

Laminar sub-layer

Laminar boundary layer

Boundary layer thickness

Displacement thickness

UNIT-3

DIMENSIONAL AND MODEL ANALYSIS

Dimensional analysis

Fundamental dimension

Secondary quantities

Dimensional homogeneity

Methods of dimensional analysis

1. Rayleigh’s method

2. Buckingham’s pie method

Method of selecting repeating variables

Model

Prototype

Similitude

Types

1. Geometric similarity

2. Kinematic similarity

3. Dynamic similarity

Types of forces acting in moving fluid

Dimensionless numbers

Model laws

Classification of models

1. Undistorted models

2. Distorted models

Advantages

Scale ratios for distorted models

1. Scale ratio for velocity

2. Scale ratio for area of flow

3. Scale ratio for discharge

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