Hybrid Nanofluids for Convection Heat Transfer

Hafiz Muhammad Ali

• Publisher: Academic Press
• Year: 2020
• Print ISBN: 9780128192801
• eBook ISBN: 9780128192818
• Topic: Technology & Engineering
• Subtopic: Thermodynamics
• Index: Technology & Engineering

Hybrid Nanofluids for Convection Heat Transfer discusses how to maximize heat transfer rates with the addition of nanoparticles into conventional heat transfer fluids. The book addresses definitions, preparation techniques, thermophysical properties and heat transfer characteristics with mathematical models, performance-affecting factors, and core applications with implementation challenges of hybrid nanofluids. The work adopts mathematical models and schematic diagrams in review of available experimental methods. It enables readers to create new techniques, resolve existing research problems, and ultimately to implement hybrid nanofluids in convection heat transfer applications. - Provides key heat transfer performance and thermophysical characteristics of hybrid nanofluids - Reviews parameter selection and property measurement techniques for thermal performance calibration - Explores the use of predictive mathematical techniques for experimental properties

Chapter 1

History and introduction

Mohammad Hemmat Esfe¹, Saeed Esfandeh^{1, 2} and Mohammad Hassan Kamyab¹, ¹Department of Mechanical Engineering, Imam Hossein University, College of Engineering, Tehran, Iran, ²Department of Mechanical Engineering, Jundishapur University of Technology, Dezful, Iran

Abstract

Miniaturizing and downscaling cooling and heating devices has been one of the main concerns of experts and engineers in various industries. Miniaturized sensors, actuators, motors, heat exchangers, pump and heat pumps, and fuel cells are some of the instruments that will help the industries to thrive. Although there are some contradictions between researcher’s ideas about heat transfer mechanisms of nanofluid, the common belief is that nanofluids are intelligently choice to realize the miniaturized and downscaled world. Having impressive improved convective and conductive thermal behaviors of nanofluids introduced them as a candidate for working fluid in miniaturized systems. One of the main barriers in front of moving the nanofluid applications from the laboratory scale to the marketplace and industries is its high cost. In the continuation of nanofluid research, as the second step, the experts tried to use simultaneous use of dissimilar nanoparticles in conventional working fluids known as hybrid nanofluids. They found hybrid nanofluid more effective economically and thermally in comparison to conventional nanofluid. In addition to feasibility of miniaturization of devices and systems using conventional nanofluids, hybrid nanofluids as super thermal and thermophysical improved working fluids than conventional fluids and nanofluids could be applied in desalination systems, solar systems, power plant cycle, etc. to reach more efficient systems.

Keywords

Microscale heat transfer; nanoscale heat transfer; hybrid nanofluid; convection heat transfer; heat transfer enhancement

Chapter Outline

Outline

• 1.1 History 1
  • 1.1.1 Conventional methods to enhance heat transfer 2
  • 1.1.2 Microscale additives in fluids 2
  • 1.1.3 Nanoscale additives in fluids 3
  • 1.1.4 Nanoscale particles and nanofluids 4
• 1.2 Introduction 9
  • 1.2.1 Fundamental of conduction 10
  • 1.2.2 Fundamental of convection 11
  • 1.2.3 Fundamental of radiation 11
  • 1.2.4 Fundamental of viscosity 13
  • 1.2.5 Fundamental of density 14
  • 1.2.6 Fundamental of heat capacity 14
• 1.3 Nanofluid and hybrid nanofluid 15
  • 1.3.1 Unique characteristics of hybrid nanofluid 18
  • 1.3.2 Microscale heat transfer 20
  • 1.3.3 Nanoscale heat transfer 22
• 1.4 Conclusion 40
• Nomenclature 41
• References 43

1.1 History

The initial spark of heat transfer science can be attributed to Galileo Galilei [1] with the invention of the Galilean thermometer in the 16th century and Newton [2] by presenting Newton’s cooling law as the first heat transfer formula in the 18th century. Then we can refer to Fourier’s mathematical theory of heat transfer in 1822 [2]. In fact, from the beginning of the 17th century through the middle of the 19th century, many of the basic concepts of heat transfer, such as heat, temperature, thermal energy, specific heat, latent heat, and kinetic energy, were defined, as well as the first and second rules of thermodynamics were introduced. Nevertheless, the history of modern heat transfer science dates back to the 1930s and is still ongoing [3]. The breadth and variety of subsystems of heat transfer science over the years has led to the division of this science into many specialized subdivisions, including the three main subsections of convection, radiation, and conduction heat transfer. Today, heat transfer is one of the important branches of study in many engineering disciplines, including m...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• List of contributors
• Biography
• Chapter 1. History and introduction
• Chapter 2. Hybrid nanofluids preparation method
• Chapter 3. Thermophysical and rheological properties of hybrid nanofluids
• Chapter 4. Hybrid nanofluids as a heat transferring media
• Chapter 5. Performance effecting parameters of hybrid nanofluids
• Chapter 6. Applications of hybrid nanofluids in different fields
• Chapter 7. Barriers and challenges in hybrid nanofluids development and implementation
• Index