About Book

Heat transfer refers to the process when two or more physical systems exchange thermal energy. Heat transfer is a result of the spatial variation of temperature within a medium, or within adjacent media, in which thermal energy may be stored, converted to or from other forms of energy and work, or exchanged with the surroundings. Heat transfer occurs in many natural and engineered systems. By convection the complex heat transfer process is divided into a number of simpler processes: heat conduction, convection and radiation. Each of these heat transfer processes obeys its laws. As an engineering discipline, heat transfer deals with the innovative use of the principles of thermal science in solving the relevant technological problems. As an academic discipline, it is part of the more general area of thermal science and engineering. This book unfolds the innovative aspects of heat transfer which will be crucial for the holistic understanding of the subject of heat transfer. It is designed in such a way that it provides a detailed explanation of the various concepts and applications of this subject matter. It focuses on thermal insulations, bioheat transfer, nanofluids, heat exchanger, nucleation, enhancement methods and numerical solution model. The aim of this book is to make the complex subject of heat transfer easy to comprehend and understand. The various applications along with technological progress that have future implications are glanced at in it. Those in search of information to further their knowledge will be greatly assisted by this book.

Preface............................................................................................................v

Chapter 1 Advances in Concentrated Solar Power: A Perspective of Heat Transfer.........................................................................................................1

Abstract...................................................................................................1

1. Introduction............................................................................................2

2. Comparison of photovoltaics with concentrated solar power.....3

3. Heat transfer in concentrated solar power plants..........................6

4. Thermal energy storage in concentrated solar power.................10

5. Materials for thermal energy storage..............................................14

6. Characteristics of thermal fluids......................................................16

7. Current issues in CSP........................................................................18

8. Conclusion............................................................................................18

Acknowledgements.............................................................................19

Conflict of interest..............................................................................19

Chapter 2 A Numerical Solution Model for the Heat Transfer in Octagonal Billets...........................................................................................................23

Abstract.................................................................................................23

1. Introduction..........................................................................................24

2. Formulation of the heat-transfer problem.....................................26

3. Theoretical solution............................................................................27

4. Numerical solution.............................................................................29

5. Running the computer program......................................................31

6. Results and discussion.......................................................................31

7. Conclusions..........................................................................................39

Acknowledgements.............................................................................39

Chapter 3 A Review of Heat Transfer Enhancement Methods Using Coiled

Wire and Twisted Tape Inserts.............................................................45

Abstract.................................................................................................45

1. Introduction..........................................................................................46

2. Simple definitions used to evaluate heat transfer

enhancement........................................................................................47

3. Heat transfer enhancement with twisted tape and coiled wire

inserts....................................................................................................48

4. Conclusions..........................................................................................56

Acknowledgements.............................................................................57

Chapter 4 Boiling Heat Transfer: Convection Controlled by Nucleation......67

Abstract.................................................................................................67

1. Introduction..........................................................................................67

2. The MTD as an alternative to traditional approaches................69

3. Hard steps to recognition..................................................................84

4. Concluding remarks...........................................................................86

Chapter 5 Basic Aspects of Gas Turbine Heat Transfer.....................................92

Abstract.................................................................................................92

1. Introduction..........................................................................................92

2. Design consideration of cooled turbine blades.............................95

3. Turbine blade thermal analysis........................................................98

4. External heat transfer of cooled turbine airofoils.......................102

5. Internal heat transfer of cooled turbine airofoils.......................111

6. Gas turbine heat transfer validation.............................................122

7. Conclusion..........................................................................................124

Chapter 6 Analysis of Heat Transfer in an Experimental Heat Exchanger

Using Numerical Simulation...............................................................131

Abstract...............................................................................................131

1. Introduction........................................................................................132

2. Numerical simulation.......................................................................141

3. Results.................................................................................................142

4. Conclusion..........................................................................................148

Chapter 7 Application of Nanofluids in Heat Transfer...................................150

1. Introduction........................................................................................150

2. Thermo physical properties of nanofluids .................................153

3. Applications of nanofluids ............................................................155

4. Heat transfer applications ..............................................................156

5. Conclusion .........................................................................................180

Chapter 8 Analytical and Experimental Investigation About Heat Transfer of Hot-Wire Anemometry .........................................................................187

1. Introduction ......................................................................................187

2. Theoretical background ..................................................................189

3. Experimental procedure .................................................................192

4. Results and discussions...................................................................193

5. Conclusion .........................................................................................208

6. Appendix ...........................................................................................209

Chapter 9 Analytical Solutions to 3-D Bioheat Transfer Problems with or without Phase Change...........................................................................211

1. Introduction........................................................................................211

2. Motivations of analytical solutions to bioheat transfer

problem ..............................................................................................212

3. Bioheat transfer problems without phase change ....................215

4. Bioheat transfer problems with phase cha-nge...........................231

5. Conclusion..........................................................................................248

Acknowledgement.............................................................................250

Chapter 10 A New Method for Numerical Modeling of Heat Transfer in Thermal Insulations Products ............................................................254

1. Introduction ......................................................................................254

2. Physical model and mathematical formulation .........................255

3. Radiation modeling .........................................................................256

4. Computational procedure ..............................................................262

5. Discussion .........................................................................................263

6. Conclusion .........................................................................................269

Citation......................................................................................................281

Index...........................................................................................................283

About Author

Skyler Burnett pursued his Ph.D. in Mechanical Engineering from State Technological University, Lima. He is an Adjunct Professor at University College, Montevideo. He is actively engaged in the researches focused on thermal expansion, laws of thermodynamics and thermal equilibrium. His works on heat transfer phenomena, heat exchangers and heat treatment applications in engineering, have been published in various books as reference material. Burnett is an active member of several scientific and technical societies, where he continues to share his expertise and knowledge in the field of heat transfer.