Adrian Bejan

Heat Transfer (eBook, PDF)

Evolution, Design and Performance

• Format: PDF

Produktbeschreibung

HEAT TRANSFER Provides authoritative coverage of the fundamentals of heat transfer, written by one of the most cited authors in all of Engineering Heat Transfer presents the fundamentals of the generation, use, conversion, and exchange of heat between physical systems. A pioneer in establishing heat transfer as a pillar of the modern thermal sciences, Professor Adrian Bejan presents the fundamental concepts and problem-solving methods of the discipline, predicts the evolution of heat transfer configurations, the principles of thermodynamics, and more. Building upon his classic 1993 book Heat Transfer, the author maintains his straightforward scientific approach to teaching essential developments such as Fourier conduction, fins, boundary layer theory, duct flow, scale analysis, and the structure of turbulence. In this new volume, Bejan explores topics and research developments that have emerged during the past decade, including the designing of convective flow and heat and mass transfer, the crucial relationship between configuration and performance, and new populations of configurations such as tapered ducts, plates with multi-scale features, and dendritic fins. Heat Transfer: Evolution, Design and Performance: * Covers thermodynamics principles and establishes performance and evolution as fundamental concepts in thermal sciences * Demonstrates how principles of physics predict a future with economies of scale, multi-scale design, vascularization, and hierarchical distribution of many small features * Explores new work on conduction architecture, convection with nanofluids, boiling and condensation on designed surfaces, and resonance of natural circulation in enclosures * Includes numerous examples, problems with solutions, and access to a companion website Heat Transfer: Evolution, Design and Performance is essential reading for undergraduate and graduate students in mechanical and chemical engineering, and for all engineers, physicists, biologists, and earth scientists.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 608
• Erscheinungstermin: 22. März 2022
• Englisch
• ISBN-13: 9781119467458
• Artikelnr.: 63653703

Autorenporträt

Adrian Bejan is J. A. Jones Distinguished Professor in the Department of Mechanical Engineering and Materials Science at Duke University, USA. His main areas of research are thermodynamics, heat transfer, fluid mechanics, and design evolution in nature. He is the author of 30 books and 700 peer-refereed journal articles and is an Honorary Member of the American Society of Mechanical Engineers (ASME).

Inhaltsangabe

Preface xi

About the Author xv

Acknowledgments xvi

List of Symbols xvii

About the Companion Website xxvi

1 Introduction 1

1.1 Fundamental Concepts 1

1.1.1 Heat Transfer 1

1.1.2 Temperature 2

1.1.3 Specific Heats 4

1.2 The Objective of Heat Transfer 5

1.3 Conduction 6

1.3.1 The Fourier Law 6

1.3.2 Thermal Conductivity 8

1.3.3 Cartesian Coordinates 12

1.3.4 Cylindrical Coordinates 14

1.3.5 Spherical Coordinates 15

1.3.6 Initial and Boundary Conditions 16

1.4 Convection 18

1.5 Radiation 23

1.6 Evolutionary Design 24

1.6.1 Irreversible Heating 25

1.6.2 Reversible Heating 27

References 29

Problems 30

2 Unidirectional Steady Conduction 37

2.1 Thin Walls 37

2.1.1 Thermal Resistance 37

2.1.2 Composite Walls 39

2.1.3 Overall Heat Transfer Coefficient 40

2.2 Cylindrical Shells 42

2.3 Spherical Shells 44

2.4 Critical Insulation Radius 45

2.5 Variable Thermal Conductivity 48

2.6 Internal Heat Generation 49

2.7 Evolutionary Design: Extended Surfaces (Fins) 51

2.7.1 The Enhancement of Heat Transfer 51

2.7.2 Constant Cross-Sectional Area 53

2.7.2.1 The Longitudinal Conduction Model 53

2.7.2.2 Long Fin 54

2.7.2.3 Fin with Insulated Tip 55

2.7.2.4 Heat Transfer Through the Tip 57

2.7.2.5 Fin Efficiency 58

2.7.2.6 Fin Effectiveness 59

2.7.3 Variable Cross-Sectional Area 60

2.7.4 Scale Analysis: When the Unidirectional Conduction Model Is Valid 61

2.7.5 Fin Shape Subject to Volume Constraint 63

2.7.6 Heat Tube Shape 64

2.7.7 Rewards from Freedom 66

References 70

Problems 71

3 Multidirectional Steady Conduction 85

3.1 Analytical Solutions 85

3.1.1 Two-Dimensional Conduction in Cartesian Coordinates 85

3.1.1.1 Homogeneous Boundary Conditions 85

3.1.1.2 Separation of Variables 87

3.1.1.3 Orthogonality 88

3.1.2 Heat Flux Boundary Conditions 92

3.1.3 Superposition of Solutions 95

3.1.4 Cylindrical Coordinates 98

3.1.5 Three-Dimensional Conduction 100

3.2 Integral Method 101

3.3 Scale Analysis 103

3.4 Evolutionary Design 104

3.4.1 Shape Factors 104

3.4.2 Trees: Volume-Point Flow 108

3.4.3 Rewards from Freedom 111

References 113

Problems 114

4 Time-Dependent Conduction 121

4.1 Immersion Cooling or Heating 121

4.2 Lumped Capacitance Model (The "Late" Regime) 124

4.3 Semi-infinite Solid Model (The "Early" Regime) 125

4.3.1 Constant Surface Temperature 125

4.3.2 Constant Heat Flux Surface 128

4.3.3 Surface in Contact with Fluid Flow 129

4.4 Unidirectional Conduction 133

4.4.1 Plate 133

4.4.2 Cylinder 138

4.4.3 Sphere 141

4.4.4 Plate, Cylinder, and Sphere with Fixed Surface Temperature 142

4.5 Multidirectional Conduction 148

4.6 Concentrated Sources and Sinks 152

4.6.1 Instantaneous (One-Shot) Sources and Sinks 152

4.6.2 Persistent (Continuous) Sources and Sinks 154

4.6.3 Moving Heat Sources 156

4.7 Melting and Solidification 158

4.8 Evolutionary Design 162

4.8.1 Spacings Between Buried Heat Sources 162

4.8.2 The S-Curve