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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Nanofluids, i.e., dilute suspensions of nanoparticles in liquids, may exhibit quite different thermal properties than the pure carrier fluids. For example, numerous experiments with nanofluids have shown that the effective thermal conductivities for such mixtures are measurably elevated, and hence beneficial applications to (micro-scale) cooling are obvious. A very different application of nanofluids could be in modern medicine, where for example, nanodrugs are mixed in microchannels for controlled delivery with bio-MEMS. In general, to optimize nanofluid flow in microchannels, best possible conduit geometries, mixing units, and device operational conditions have to be found for specific applications. Specifically, a suitable model of common nanofluids, performance as well as cost effective mixers, and entropy minimizing channel designs are the prerequisites for achieving these project objectives. Two effective thermal conductivity models for nanofluids were compared in detail, where the new KKL (Koo-Kleinstreuer-Li) model, based on Brownian-motion induced micro-mixing, achieved good agreements with the currently available experimental data sets. The thermal performance of nanofluid flow in a trapezoidal microchannel was analyzed using pure water as well as a nanofluid, i.e., CuO-water, with volume fractions of 1% and 4% CuO-particles with . It was found that nanofluids do measurably enhance the thermal performance of microchannel mixture flow with a small increase in pumping power. Specifically, the thermal performance increases with volume fraction; but, the extra pressure drop, or pumping power, will somewhat decrease the beneficial effects. Microchannel heat sinks with nanofluids are expected to be good candidates for the next generation of cooling devices. Microcooling device design aspects in light of minimization of entropy generation were investigated numerically. The influence of the Reynolds number (inlet velocity), fluid inlet temperature, channel geometr.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Nanofluids, i.e., dilute suspensions of nanoparticles in liquids, may exhibit quite different thermal properties than the pure carrier fluids. For example, numerous experiments with nanofluids have shown that the effective thermal conductivities for such mixtures are measurably elevated, and hence beneficial applications to (micro-scale) cooling are obvious. A very different application of nanofluids could be in modern medicine, where for example, nanodrugs are mixed in microchannels for controlled delivery with bio-MEMS. In general, to optimize nanofluid flow in microchannels, best possible conduit geometries, mixing units, and device operational conditions have to be found for specific applications. Specifically, a suitable model of common nanofluids, performance as well as cost effective mixers, and entropy minimizing channel designs are the prerequisites for achieving these project objectives. Two effective thermal conductivity models for nanofluids were compared in detail, where the new KKL (Koo-Kleinstreuer-Li) model, based on Brownian-motion induced micro-mixing, achieved good agreements with the currently available experimental data sets. The thermal performance of nanofluid flow in a trapezoidal microchannel was analyzed using pure water as well as a nanofluid, i.e., CuO-water, with volume fractions of 1% and 4% CuO-particles with . It was found that nanofluids do measurably enhance the thermal performance of microchannel mixture flow with a small increase in pumping power. Specifically, the thermal performance increases with volume fraction; but, the extra pressure drop, or pumping power, will somewhat decrease the beneficial effects. Microchannel heat sinks with nanofluids are expected to be good candidates for the next generation of cooling devices. Microcooling device design aspects in light of minimization of entropy generation were investigated numerically. The influence of the Reynolds number (inlet velocity), fluid inlet temperature, channel geometr.
Author: Mohammad Hatami Publisher: Elsevier ISBN: 0323956793 Category : Science Languages : en Pages : 322
Book Description
Nanofluids: Advanced Applications and Numerical Simulations combines the mathematical and numerical studies of nanofluids and their application to a range of applications. The book begins by introducing the principles of nanofluids, structures, types, properties, methods and stability. This is followed by a detailed chapter that explains a full range of numerical techniques for the modeling of nanofluids. Subsequent chapters offer in-depth coverage of target areas, including cooling and heating applications, micro-electric and magnetic devices, chemistry and oil recovery, biomedicine, renewable energy, and automotive engineering. Throughout the book, methods for numerical modelling are described in detail, with supporting equations, techniques, and applied examples. This is a valuable resource for advanced students, scientists, engineers, and R&D professionals working with nanofluids, simulation, and numerical methods for advanced applications, as well as researchers across nanotechnology, biomedicine, electronics, energy, chemistry, materials science and mechanical engineering. Presents numerical methods for modelling of nanofluids in details Examines stability, magnetic field, electric field, and other effects on behavior and optical properties Explores cutting-edge applications of nanofluids by numerical methods
Author: Mohsen Sheikholeslami Publisher: William Andrew ISBN: 0128123982 Category : Science Languages : en Pages : 620
Book Description
Applications of Nanofluid for Heat Transfer Enhancement explores recent progress in computational fluid dynamic and nonlinear science and its applications to nanofluid flow and heat transfer. The opening chapters explain governing equations and then move on to discussions of free and forced convection heat transfers of nanofluids. Next, the effect of nanofluid in the presence of an electric field, magnetic field, and thermal radiation are investigated, with final sections devoted to nanofluid flow in porous media and application of nanofluid for solidification. The models discussed in the book have applications in various fields, including mathematics, physics, information science, biology, medicine, engineering, nanotechnology, and materials science. Presents the latest information on nanofluid free and force convection heat transfer, of nanofluid in the presence of thermal radiation, and nanofluid in the presence of an electric field Provides an understanding of the fundamentals in new numerical and analytical methods Includes codes for each modeling method discussed, along with advice on how to best apply them
Author: S. Harikrishnan Publisher: Springer Nature ISBN: 9811678456 Category : Science Languages : en Pages : 105
Book Description
This comprehensive book focuses on the basic physical features and purpose of nanofluids and miniature heat sinks. The contents demonstrate the design modification, fabrication, experimental investigation, and various applications of miniature heat sinks. The book provides context for thermal performance of miniature heat sinks as well as summaries of experimental results correlations that reflect the current technical innovations are included. This book is a useful reference for both academia and industry alike.
Author: Sheikholeslami, Mohsen Publisher: IGI Global ISBN: 1522575960 Category : Technology & Engineering Languages : en Pages : 692
Book Description
Different numerical and analytical methods have been employed to find the solution of governing equations for nanofluid flow and heat transfer. Applications of Nanofluid Transportation and Heat Transfer Simulation provides emerging research exploring the theoretical and practical aspects and applications of heat and nanofluid transfer. With practical examples and proposed methodology, it features coverage on a broad range of topics such as nanoparticles, electric fields, and hydrothermal behavior, making it an ideal reference source for engineers, researchers, graduate students, professionals, and academics.
Author: R. O. Fagbenle Publisher: Woodhead Publishing ISBN: 0128179503 Category : Science Languages : en Pages : 530
Book Description
Applications of Heat, Mass and Fluid Boundary Layers brings together the latest research on boundary layers where there has been remarkable advancements in recent years. This book highlights relevant concepts and solutions to energy issues and environmental sustainability by combining fundamental theory on boundary layers with real-world industrial applications from, among others, the thermal, nuclear and chemical industries. The book's editors and their team of expert contributors discuss many core themes, including advanced heat transfer fluids and boundary layer analysis, physics of fluid motion and viscous flow, thermodynamics and transport phenomena, alongside key methods of analysis such as the Merk-Chao-Fagbenle method. This book’s multidisciplinary coverage will give engineers, scientists, researchers and graduate students in the areas of heat, mass, fluid flow and transfer a thorough understanding of the technicalities, methods and applications of boundary layers, with a unified approach to energy, climate change and a sustainable future. Presents up-to-date research on boundary layers with very practical applications across a diverse mix of industries Includes mathematical analysis to provide detailed explanation and clarity Provides solutions to global energy issues and environmental sustainability
Author: Andrej Kitanovski Publisher: Springer ISBN: 331908741X Category : Technology & Engineering Languages : en Pages : 471
Book Description
This book provides the latest research on a new alternative form of technology, the magnetocaloric energy conversion. This area of research concerns magnetic refrigeration and cooling, magnetic heat pumping and magnetic power generation. The book’s systematic approach offers the theoretical basis of magnetocaloric energy conversion and its various sub domains and this is supported with the practical examples. Besides these fundamentals, the book also introduces potential solutions to engineering problems in magnetocalorics and to alternative technologies of solid state energy conversion. The aim of the book is therefore to provide engineers with the most up-to-date information and also to facilitate the understanding, design and construction of future magnetocaloric energy conversion devices. The magnetocaloric energy conversion represents an alternative to compressor based refrigerators and heat pumps. It is a serious alternative to power generation with low enthalpy heat sources. This green technology offers an opportunity to use environmentally friendly solid refrigerants and the potentially high energy efficiency follows the trends of future energy conversion devices. This book is intended for postgraduate students and researchers of refrigeration, heat pumping, power generation alternatives, heat regenerators and advanced heat transfer mechanisms.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The compactness and high surface-to-volume ratios of microscale liquid flow devices make them attractive alternatives to conventional flow systems for heat transfer augumentation, chemical reactor or combustor miniaturization, aerospace technology implementations, as well as biomedical applications, such as drug delivery, DNA sequencing, and bio-MEMS, to name a few. While experimental evidence indicates that fluid flow in microchannels, especially in terms of wall friction and heat transfer performance, differs from macrochannel flow behavior, laboratory observations are often inconsistent and contradictory. Some researchers attributed the deviations to unknown microscale effects, which often turned out to originate from inappropriate approaches to analyze the new phenomena. Specifically, system parameters were neglected, which are not important on the macroscale but play important roles in microscale analyses The main objectives of the study are to identify important parameters for microscale liquid flows and nanoparticle suspensions, to find a physically sound way to analyze the new phenomena, and to provide mathematical models to simulate them. Scale analysis was found to be a valuable tool to determine which forces become important on the microscale. With increasing system miniaturization surface forces, such as surface tension and van der Waals forces, take over the control from body forces like gravity and pressure. Furthermore, surface roughness, viscous dissipation, and entrance region effects are very important liquid flow parameters in microscale conduits. In summary, for liquid flow in microchannels with a characteristic width or height of L e"10 [µm], the continuum approach, in conjunction with appropriate closure models, is appropriate to analyze microscale effects. Employing the porous medium layer (PML) idea, surface roughness effects on momentumand heat-transfer in micro-conduits were numerically investigated and verified with experimental.
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Author: Jie Li
Author: Mohammad Hatami
Author: Mohsen Sheikholeslami
Author: Rahmat Ellahi
Author: S. Harikrishnan
Author: Sheikholeslami, Mohsen
Author: R. O. Fagbenle
Author: Andrej Kitanovski
Author: