# Fundamentals of Thermal-Fluid Sciences 5th Edition

## Book Preface

This text is an abbreviated version of standard thermodynamics, fluid mechanics, and heat transfer texts, covering topics that the engineering students are most likely to need in their professional lives. The thermodynamics portion of this text is based on the text Thermodynamics: An Engineering Approach by Y. A. Çengel and M. A. Boles, the fluid mechanics portion is based on Fluid Mechanics: Fundamentals and Applications by Y. A. Çengel and J. M. Cimbala, and the heat transfer portion is based on Heat and Mass Transfer: Fundamentals and Applications by Y. A. Çengel and A. J. Ghajar, all published by McGraw-Hill. Most chapters are practically independent of each other and can be covered in any order. The text is well-suited for curriculums that have a common introductory course or a two-course sequence on thermal-fluid sciences or on thermodynamics and heat transfer. It is recognized that all topics of thermodynamics, fluid mechanics, and heat transfer cannot be covered adequately in a typical three-semester-hour course, and, therefore, sacrifices must be made from the depth if not from the breadth. Selecting the right topics and finding the proper level of depth and breadth are no small challenge for the instructors, and this text is intended to serve as the ground for such selection. Students in a combined thermal-fluids course can gain a basic understanding of energy and energy interactions, various mechanisms of heat transfer, and fundamentals of fluid flow. Such a course can also instill in students the confidence and the background to do further reading of their own and to be able to communicate effectively with specialists in thermal-fluid sciences.

OBJECTIVES

This book is intended for use as a textbook in a first course in thermal-fluid sciences for undergraduate engineering students in their junior or senior year, and as a reference book for practicing engineers. Students are assumed to have an adequate background in calculus, physics, and engineering mechanics. The objectives of this text are • To cover the basic principles of thermodynamics, fluid mechanics, and heat transfer. • To present numerous and diverse real-world engineering examples to give students a feel for how thermal-fluid sciences are applied in engineering practice. • To develop an intuitive understanding of thermal-fluid sciences by emphasizing the physics and physical arguments. The text contains sufficient material to give instructors flexibility and to accommodate their preferences on the right blend of thermodynamics, fluid mechanics, and heat transfer for their students. By careful selection of topics, an instructor can spend one-third, one-half, or two-thirds of the course on thermodynamics and the rest on selected topics of fluid mechanics and heat transfer.

PHILOSOPHY AND GOAL

The philosophy that contributed to the warm reception of the first edition of this book has remained unchanged. Namely, our goal is to offer an engineering textbook that • Communicates directly to the minds of tomorrow’s engineers in a simple yet precise manner. • Leads students toward a clear understanding and firm grasp of the basic principles of thermal-fluid sciences. • Encourages creative thinking and development of a deeper understanding and intuitive feel for thermal-fluid sciences. • Is read by students with interest and enthusiasm rather than being used as an aid to solve problems. Special effort has been made to appeal to readers’ natural curiosity and to help students explore the various facets of the exciting subject area of thermal-fluid sciences. The enthusiastic response we received from the users of the previous editions—from small colleges to large universities all over the world—indicates that our objectives have largely been achieved. It is our philosophy that the best way to learn is by practice. Therefore, special effort is made throughout the book to reinforce material that was presented earlier. Yesterday’s engineers spent a major portion of their time substituting values into the formulas and obtaining numerical results. However, now formula manipulations and number crunching are being left to computers. Tomorrow’s engineer will need to have a clear understanding and a firm grasp of the basic principles so that he or she can understand even the most complex problems, formulate them, and interpret the results. A conscious effort is made to emphasize these basic principles while also providing students with a look at how modern tools are used in engineering practice.

NEW IN THIS EDITION

All the popular features of the previous editions are retained while new ones are added. The main body of the text remains largely unchanged. The primary change in this fifth edition of the text is the effective use of full color to enhance the learning experience of students and to make it more enjoyable. Another change is the update of the R-134a tables to make property values consistent with those from the latest version of EES. All the solved examples and end-of-chapter problems dealing with R-134a are modified to reflect this change. A large number of the problems in the text are modified and many problems are replaced by new ones. Also, some of the solved examples are replaced by new ones.

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