M. Necati Ozisik

This book provides various aspects of Heat Transfer written by in a simple and lucid style to help the reader grasp the information quickly and easily. The book contains 14 chapters and each chapter present update material sufficient to meet the students expectations from a basic textbook.
The field of heat transfer is so wide and diversified that an orderly presentation of scientific facts is essential for effective teaching of this subject. In our teaching, we should place emphasis not only to the transmission of the knowledge but also to the laying of a strong foundation on which future knowledge can readily be accumulated and the acquired knowledge can be fully utilized for useful purposes. This book, although based on my 1977 book entitled Basic Heat Transfer, is actually completely rewritten and reorganized, first by pedagogical considerations, and second by providing a large number of fully worked out illustrative examples, a large number of problems at the end of each chapter, summary tables for ready reference, improved heat transfer charts and correlations, and comprehensive physical property tables to help to increase its usefulness in practical applications.
The role of an introductory text on the subject is to establish the guidelines for the transmission of the knowledge and serve as the catalizer in the interaction between the teaching and learning processes. Therefore, it is not only the knowledge contained in a book but also its organization which influences the effectiveness of teaching. These principles have been the basic guidelines in the preparation of this undergraduate text for the teaching of heat transfer in engineering schools for the mechanical, chemical, and nuclear engineering students.
There is sufficient material in this book to meet individual course objectives at different levels, in both the junior and senior years. The spectrum of its possible uses may range from a one-semester basic heat transfer course to a sequence of two-quarter or two-semester courses spread over the junior and/or senior years. When used in a sequence course, conduction, finite differences, and radiation should preferably be covered first, followed by convection, boiling and condensation, and heat exchangers.
The book can also serve as a source of ready reference for engineering graduates and industry. A background in differential equations at the sophomore level and some familiarity with fluid mechanics are all needed for following this book.
Chapter 1 introduces the basic concepts and gives a bird's-eye view of the mechanisms of heat transfer. A discussion of units and conversion factors is also presented. Chapter 2 builds up the necessary background for the understanding of the physical significance of the heat conduction equation and its boundary conditions. Emphasis is placed on the development of necessary skills needed for the mathematical formulation of practical heat conduction problems. This matter is illustrated with numerous representative examples. Chapter 3 provides an introduction to the solving of heat conduction problems and developing analytic expressions for the determination of temperature distribution and heat flow in solids. Only the one-dimensional steady-state heat conduction problems are considered. The thermal-resistance concept is introduced for use in the determination of heat transfer through composite layers. The analysis and application of heat flow through fins are presented. In Chapter 4 the concept of transient heat flow is introduced through the use of the lumped system analysis because of its simplicity.
Chapter 5 presents the fundamentals of finite-difference methods for the solution of both steady and time-dependent heat conduction problems. The application is illustrated with numerous examples and a computer program is given for solving the resulting finite-difference equations.
Finally, in Chapter 14 the analysis of mass transfer is presented with an analogy of heat transfer by diffusion and forced convection. The SI (Systeme Internationale) system of units is used throughout this book. Comprehensive conversion factors and physical property tables are presented in the Appendix. To provide some feel for the relative magnitude of physical properties in the SI and Btu units, some property tables are also included in both system of units.
There are more than 170 fully worked-out examples to illustrate the application of the basic theory and concepts. Over 800 problems, arranged in the same order as the material presented in the text, are included at the ends of the chapters with answers provided for some of the representative ones. A summary of fundamental equations are tabulated at the end of each chapter for ready reference. This book is the outcome of many years of experience in teaching and writing of textbooks in heat transfer at various levels. It is hoped that it will be helpful to improve the effectiveness of teaching and learning of the subject of heat transfer. I am indebted to many of my colleagues and students for their valuable suggestions toward achieving the objectives stated previously. I wish to thank Dr. S. Kakac for providing useful comments on the text and Y. Cengel for thoroughly reading the manuscript.


HEAT TRANSFER

M. Necati Ozisik

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