Elements of Heat and Mass Transfer

This text is a thoroughly revised and enlarged Edition of the book Heat and Mass Transfer which was very well received by the readers. The aim of this edition remains the same as that of the first edition: to guide the students towards a Sound Physical basis of obtaining first estimates of the varied heat and mass transfer problem that they are likely to encounter. For this Purpose the book develops the physical principles with a fairly high Level of rigour, but at the same time devotes considerable attention to the techniques of approximations and Modelling of Complex physical situations so that they become amenable to alimentary methods of analysis.

Some of the Novel features of this book are: it brings together in Chapter 1 an overview of the subject, exposing the reader to the wide variety of contexts in which heat and mass transfer problems arise in Engineering practice; it provides very early the technique of normalizing the governing equations and boundary conditions to be able to meaningfully talk of the approximations resorted to in various alimentary techniques; it introduces the essence of the convection phenomenon through one case where it is brought out the best with least clouding by mathematics, namely, transpiration cooling; it treats in Chapter 5 the Essentials of convection including the concept of boundary layer and dimensionless correlations at a lower Mathematical level than it is traditionally done; It brings out the concept of full-development with physical insights; and it consciously attempts to bring out the similarity between heat and mass transfer and Uses the same symbols with the hope that the additional efforts to Learn mass transfer will be considerably reduced.

Vijay Gupta is a Professor of Aerospace Engineering at Indian Institute of Technology Kanpur. A graduate of I.I.T. Delhi, he obtained his Ph.D. From the University of Minnesota. His Research includes high speed Aerodynamics and bio-fluid mechanics. He has co-authored the text-books An Introduction to Engineering Design Methods and Fluid Mechanics and Its Applications. He is deeply interested in the process and technology of engineering Education and has produced a number of educational videos. He Won the Best Presentation Award for his video.

Preface

I. TRANSFER PROCESSES :
1. Introduction
2. Nature of Transfer Processes
3. Concept of Driving Potential
4. Physical Mechanisms
5. Heat Transfer in Fluids - Convention
6. Convective Mass Transfer
7. Radiant Energy Exchange
8. Description of Some Heat and Mass Transfer Processes
Problems

II. CONDUCTION : HEAT TRANSFER IN Stationary MEDIUM :
1. Introduction
2. A Physical Law for Heat Transfer
3. Methodology
4. Basic Equation of Heat Conduction
5. Boundary and Initial Conditions
6. Thermal Properties of Matter
7. Non-Dimensionalization of Conduction Problem
Problems

III. EXAMPLES IN CONDUCTION :
1. Introduction
2. Steady-State Conduction in a Slab
3. Heat Conduction Across a Cylindrical Shell
4. Steady Conduction in a Spherical Shell
5. Fins
6. Conduction with Uniformly Distributed Heat Sources
7. Transient Conduction
8. Steady-State Conduction in Two-Dimensions
9. Transient Conduction in Multi-Dimensions
Problems

IV. NUMERICAL SOLUTION OF CONDUCTION PROBLEMS :
1. Introduction
2. Finite Difference Equation
3. Method of Energy Balance
4. Finite Difference Formulation of Heat Conduction Problem
5. Numerical Methods of Solution
6. Numerical Solution of Unsteady Heat Conduction Problems
Problems

V. CONVECTION : HEAT TRANSFER IN FLUIDS :
1. Introduction
2. Transpiration Cooling-Basic Mechanism of Heat Convection
3. Convection from a Hot Body in a Stream
4. Conservation Laws
5. Conservation of Mass - The Continuity Equation
6. The Momentum Equation
7. The Energy Equation
8. Using the Conservation Equations
9. Concept of Boundary Layer
10. Reynolds Analogy
11. Transport in Turbulent Flows
12. Dimensionless Correlations for Convection
Problems

VI. EXAMPLES IN HEAT CONVECTION :
1. Introduction
2. Bulk Temperature
3. Concept of Fully Developed Flow
4. Heat Transfer in Couette Flow
5. Flow Through a Circular Tube
6. Heat Transfer in External Convection
7. Free Convection
8. Condensation
9. Boiling
Problems

VII. MASS TRANSFER :
1. Introduction
2. Definitions of Various Quantities Relevant to Mass Transfer
3. A physical Law for Diffusion - Pick's Law
4. Species Conservation Equation
5. Boundary Conditions
6. Steady-State Diffusion in a Dilute Solution in a Stationary Medium
7. Steady-State Non-Dilute Diffusion with one Component Stationary
8. Steady-State Diffusion with Homogeneous Chemical Reaction
9. Transient Diffusion in Dilute Solutions in Stationary Media
Problems

VIII. CONVECTIVE MASS TRANSFER :
1. Introduction
2. Governing Equations
3. Absorption of a Gas by a Falling Film of Liquid
4. Using Correlations in Mass Convection Problems
5. Evaporative Cooling
Problems

IX. RADIATIVE TRANSFER :
1. Introduction
2. Emission of Radiation
3. Radiation Intensity
4. Laws of Black-Body Radiation
5. Radiation Properties of Real Surface
6. The Configuration Factor
7. Radiative Heat Exchange Between Black-Body Surfaces
8. Radiative Transfer Between Gray-Diffuse Surfaces
9. Free Molecular Flow
Problems

X. HEAT AND MASS EXCHANGERS :
1. Heat Exchangers
2. In-Line Heat Exchange
3. Analysis of Heat Exchanger Performance
4. Effectiveness-Number of Transfer Unit (e - NTU) Method
5. Mass Exchang
6. Effectiveness-NTU Method for Analysis of Gas Absorbers
7. Adiabatic Humidifier
Problems