Heat Transfer Due to Laminar Natural Convection of Nanofluids

Heat Transfer Due to Laminar Natural Convection of Nanofluids

Author: De-Yi Shang

Publisher: Springer

Published: 2018-07-30

Total Pages: 210

ISBN-13: 3319944037

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This book presents a theoretical study of heat transfer due to laminar natural convection of nanofluids, using Al2O3-water nanofluid as an example. An innovative method of similarity transformation of velocity fields on laminar boundary layers is applied for the development of a mathematical governing model of natural convection with actual nanofluids, and a novel model of the nanofluid's variable thermophysical properties is derived by a mathematical analysis based on the developed model of variable physical properties of fluids combined with the model of the nanofluid's thermal conductivity and viscosity. Based on these, the physical property factors of nanofluids are produced, which leads to a simultaneous solution for deep investigations of hydrodynamics and heat transfer of nanofluid's natural convection. The book also proposes novel predictive formulae for the evaluation of heat transfer of Al2O3-water nanofluid’s natural convection. The formulae have reliable theoretical and practical value because they are developed by rigorous theoretical analysis of heat transfer combined with full consideration of the effects of the temperature-dependent physical properties of nanofluids and the nanoparticle shape factor and concentration, as well as variations of fluid boundary temperatures. The conversion factors proposed help to turn the heat transfer coefficient and rate of fluid natural convection into those of nanofluid natural convection. Furthermore, several calculation examples are provided to demonstrate the heat transfer application of the proposed predictive formulae.


Heat Transfer Enhancement with Nanofluids

Heat Transfer Enhancement with Nanofluids

Author: Vincenzo Bianco

Publisher: CRC Press

Published: 2015-04-01

Total Pages: 473

ISBN-13: 1482254026

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Nanofluids are gaining the attention of scientists and researchers around the world. This new category of heat transfer medium improves the thermal conductivity of fluid by suspending small solid particles within it and offers the possibility of increased heat transfer in a variety of applications. Bringing together expert contributions from


Nanoparticle Heat Transfer and Fluid Flow

Nanoparticle Heat Transfer and Fluid Flow

Author: W. J. Minkowycz

Publisher: CRC Press

Published: 2016-04-19

Total Pages: 335

ISBN-13: 1439861951

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Featuring contributions by leading researchers in the field, Nanoparticle Heat Transfer and Fluid Flow explores heat transfer and fluid flow processes in nanomaterials and nanofluids, which are becoming increasingly important across the engineering disciplines. The book covers a wide range, from biomedical and energy conversion applications to mate


Thermal Characteristics and Convection in Nanofluids

Thermal Characteristics and Convection in Nanofluids

Author: Aditya Kumar

Publisher: Springer Nature

Published: 2021-01-04

Total Pages: 230

ISBN-13: 981334248X

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This book covers synthesis, characterization, stability, heat transfer and applications of nanofluids. It includes different types of nanofluids, their preparation methods as well as its effects on the stability and thermophysical properties of nanofluids. It provides a discussion on the mechanism behind the change in the thermal properties of nanofluids and heat transfer behaviour. It presents the latest information and discussion on the preparation and advanced characterization of nanofluids. It also consists of stability analysis of nanofluids and discussion on why it is essential for the industrial application. The book provides a discussion on thermal boundary layer properties in convection. Future directions for heat transfer applications to make the production and application of nanofluids at industrial level are also discussed.


Convective Flow and Heat Transfer from Wavy Surfaces

Convective Flow and Heat Transfer from Wavy Surfaces

Author: Aroon Shenoy

Publisher: CRC Press

Published: 2016-10-14

Total Pages: 329

ISBN-13: 1498760996

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Convective Flow and Heat Transfer from Wavy Surfaces: Viscous Fluids, Porous Media, and Nanofluids addresses the wavy irregular surfaces in heat transfer devices. Fluid flow and heat transfer studies from wavy surfaces have received attention, since they add complexity and require special mathematical techniques. This book considers the flow and heat transfer characteristics from wavy surfaces, providing an understanding of convective behavioral changes.


Nanofluids

Nanofluids

Author: Sarit K. Das

Publisher: John Wiley & Sons

Published: 2007-12-04

Total Pages: 485

ISBN-13: 0470180684

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Introduction to nanofluids--their properties, synthesis, characterization, and applications Nanofluids are attracting a great deal of interest with their enormous potential to provide enhanced performance properties, particularly with respect to heat transfer. In response, this text takes you on a complete journey into the science and technology of nanofluids. The authors cover both the chemical and physical methods for synthesizing nanofluids, explaining the techniques for creating a stable suspension of nanoparticles. You get an overview of the existing models and experimental techniques used in studying nanofluids, alongside discussions of the challenges and problems associated with some of these models. Next, the authors set forth and explain the heat transfer applications of nanofluids, including microelectronics, fuel cells, and hybrid-powered engines. You also get an introduction to possible future applications in large-scale cooling and biomedicine. This book is the work of leading pioneers in the field, one of whom holds the first U.S. patent for nanofluids. They have combined their own first-hand knowledge with a thorough review of theliterature. Among the key topics are: * Synthesis of nanofluids, including dispersion techniques and characterization methods * Thermal conductivity and thermo-physical properties * Theoretical models and experimental techniques * Heat transfer applications in microelectronics, fuel cells, and vehicle engines This text is written for researchers in any branch of science and technology, without any prerequisite.It therefore includes some basic information describing conduction, convection, and boiling of nanofluids for those readers who may not have adequate background in these areas. Regardless of your background, you'll learn to develop nanofluids not only as coolants, but also for a host ofnew applications on the horizon.


Computational Analysis to Enhance Laminar Flow Convective Heat Transfer Rate in an Enclosure Using Aerosol Nanofluids

Computational Analysis to Enhance Laminar Flow Convective Heat Transfer Rate in an Enclosure Using Aerosol Nanofluids

Author: Andrew Hudson

Publisher:

Published: 2013

Total Pages: 73

ISBN-13:

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Author's abstract: The current research intends to provide a starting point to effectively model aerosol heat transfer in a narrow, enclosed body. This research can lead to future modeling of nano fluids including their heat transfer characteristics and erosion effects on the walls of an enclosure. The model was developed using ICEM CFD for the mesh and FLUENT for the fluid flow modeling. Six different aspect ratio enclosures were developed to study the effects of varying aspect ratio. The natural convection of air was developed first to establish the appropriateness of the models being used. A mesh check was performed using one of the natural convection cases to ensure the mesh was appropriate. The forced convection of air was then developed. The velocity vector, isotherm, surface heat flux, and surface nusselt number were recorded for future comparison to models. The models for nanoparticle natural convection were then activated to ensure the distribution of particles was as expected. This research proved that nanoparticle tracking can be accomplished with a computer model instead of using the traditional volume ratio method. The effects of aspect ratio on the surface heat flux as well as surface nusselt number were recorded for both natural and forced convection of air. The development of the appropriate model for particle tracking is started and proven to be valid. The natural convection and forced convection of air has been solved for future comparison to natural and forced convection.