Diffusion And Thermal Transport In Bulk And Nano Materials

Author : Helmut Mehrer
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3035734607
Total Pages : 138 pages
Book Rating : 4.07/5 ( download)

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Download or read book Diffusion and Thermal Transport in Bulk and Nano-Materials written by Helmut Mehrer and published by Trans Tech Publications Ltd. This book was released on 2018-11-01 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is dedicated to the memory of Professor Dr. Nicolaas Augustinus Stolwijk whose works were related with study of a wide spectrum of diffusion processes in metals, intermetallic compounds, semiconductors, solar grade silicon, polymer electrolytes and in minerals.

Author : Lin Qiu
Publisher : Academic Press
ISBN 13 : 012823623X
Total Pages : 358 pages
Book Rating : 4.39/5 ( download)

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Download or read book Micro and Nano Thermal Transport written by Lin Qiu and published by Academic Press. This book was released on 2022-02-09 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro and Nano Thermal Transport Research: Characterization, Measurement and Mechanism is a complete and reliable reference on thermal measurement methods and mechanisms of micro and nanoscale materials. The book has a strong focus on applications and simulation, providing clear guidance on how to measure thermal properties in a systematic way. Sections cover the fundamentals of thermal properties before introducing tools to help readers identify and analyze thermal characteristics of these materials. The thermal transport properties are then further explored by means of simulation which reflect the internal mechanisms used to generate such thermal properties. Readers will gain a clear understanding of thermophysical measurement methods and the representative thermal transport characteristics of micro/nanoscale materials with different structures and are guided through a decision-making process to choose the most effective method to master thermal analysis. The book is particularly suitable for those engaged in the design and development of thermal property measurement instruments, as well as researchers of thermal transport at the micro and nanoscale. Includes a variety of measurement methods and thermal transport characteristics of micro and nanoscale materials under different structures Guides the reader through the decision-making process to ensure the best thermal analysis method is selected for their setting Contains experiments and simulations throughout that help apply understanding to practice

Author : S. Harikrishnan
Publisher : CRC Press
ISBN 13 : 1000787656
Total Pages : 221 pages
Book Rating : 4.58/5 ( download)

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Download or read book Thermal Transport Characteristics of Phase Change Materials and Nanofluids written by S. Harikrishnan and published by CRC Press. This book was released on 2022-12-05 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides detailed information related to nanofluids, synthesis and preparation, morphologies of nanoparticles, selection of base fluids and thermophysical properties of nanofluids. The advantage of various conduits, the improvement of the heat transfer performance of phase change materials (PCMs), and the base PCMs for diverse applications are also discussed. Crucial difficulties like stability, aggregation, and clogging of nanoparticles are detailed including factors like the size, shape, and motion of nanoparticles that influence the heat transfer performance of nanofluids. Challenges, applications, and scope of the future works in the subject area are included. Features: Covers heat transfer techniques in utilization of base fluids application of phase change materials (PCMs) Describes preparation and characterization of nanofluids and nano-based PCMs Explains how nanoscience can be utilized in heat transfer studies Reviews conventional heat transfer fluids This volume is aimed at graduate students and researchers in thermal engineering, heat transfer, material science and engineering, and heat transfer enhancement.

Author : W. J. Minkowycz
Publisher : CRC Press
ISBN 13 : 1439861951
Total Pages : 335 pages
Book Rating : 4.50/5 ( download)

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Download or read book Nanoparticle Heat Transfer and Fluid Flow written by W. J. Minkowycz and published by CRC Press. This book was released on 2016-04-19 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Author : Konstantinos Termentzidis
Publisher : CRC Press
ISBN 13 : 131534078X
Total Pages : 475 pages
Book Rating : 4.84/5 ( download)

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Download or read book Nanostructured Semiconductors written by Konstantinos Termentzidis and published by CRC Press. This book was released on 2017-09-01 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is devoted to nanostructures and nanostructured materials containing both amorphous and crystalline phases with a particular focus on their thermal properties. It is the first time that theoreticians and experimentalists from different domains gathered to treat this subject. It contains two distinct parts; the first combines theory and simulations methods with specific examples, while the second part discusses methods to fabricate nanomaterials with crystalline and amorphous phases and experimental techniques to measure the thermal conductivity of such materials. Physical insights are given in the first part of the book, related with the existing theoretical models and the state of art simulations methods (molecular dynamics, ab-initio simulations, kinetic theory of gases). In the second part, engineering advances in the nanofabrication of crystalline/amorphous heterostructures (heavy ion irradiation, electrochemical etching, aging/recrystallization, ball milling, PVD, laser crystallization and magnetron sputtering) and adequate experimental measurement methods are analyzed (Scanning Thermal Microscopy, Raman, thermal wave methods and x-rays neutrons spectroscopy).

Author : Justin Haskins
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.61/5 ( download)

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Download or read book Atomistic Study of Transport Properties at the Nanoscale written by Justin Haskins and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A first approach to engineering problems in nanosized systems requires a thorough understanding of how physical properties change as size decreases from the macroscale. One important class of properties that can be severely affected by such a downward size shift are transport properties - classical mass, momentum and energy transport. Using atomistic simulation techniques, primarily molecular dynamics, and statistical expressions for diffusion, viscosity, and thermal conductivity formulated in terms of atomistic properties, three case studies of transport in important, nanosized systems are investigated, including confined water systems, silicon-germanium nanos- tructures, and carbon nanostructures. In the first study of confined water systems, diffusion and viscosity are of primary interest, as recent experimental studies have shown notably increased rates of diffusion through nano-confined carbon nanotube structures. In this work, a full treatment of the transport properties is provided in both water clusters and water thin films, both having characteristic size scales under 11 nm. The diffusion, viscosity, and thermal conductivity in the nanosized systems are all shown to be significantly different from bulk water systems, with diffusion and thermal transport increasing and viscosity decreasing. For silicon-germanium nanostructures, the thermal transport properties are exclusively considered, with the problem of interest concerning the control of thermal transport through a strict control on the nanostructure. Quantum dot superlattices are shown to be effective structures for controlling the thermal transport properties, the available range of thermal conductivity using these structures being 0.1-160 W/mK. The final study concerns graphene nanostructures, which in terms of thermal transport have some of the highest thermal conductivities of any available materials. Control of thermal transport properties is again of primary importance, with various physical aspects - defects, shape, and size - being probed in graphene, graphene nano ribbons, carbon nanotubes, and fullerenes to determine their influence on transport; overall, these structures yield a large range of thermal transport, 10-2500 W/mK. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149231

Author : Mourad Rebay
Publisher : CRC Press
ISBN 13 : 1498736319
Total Pages : 499 pages
Book Rating : 4.12/5 ( download)

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Download or read book Microscale and Nanoscale Heat Transfer written by Mourad Rebay and published by CRC Press. This book was released on 2016-01-06 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscale and Nanoscale Heat Transfer: Analysis, Design, and Applications features contributions from prominent researchers in the field of micro- and nanoscale heat transfer and associated technologies and offers a complete understanding of thermal transport in nano-materials and devices. Nanofluids can be used as working fluids in thermal system

Author : Andreas Öchsner
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3038133809
Total Pages : 1600 pages
Book Rating : 4.03/5 ( download)

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Download or read book Diffusion in Solids and Liquids V written by Andreas Öchsner and published by Trans Tech Publications Ltd. This book was released on 2010-04-13 with total page 1600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current water-treatment technologies require considerable energy consumption. Thus, closely linked to the problem of water shortage is the impending energy crisis. Therefore, intensive research is being aimed at developing water purification processes that are based upon using renewable energy, such as solar energy, rather than energy generated using fossil fuels. There has been an accumulation of reports on the development of photocatalysts, which enable water purification using solar energy as the only driving force. Such photocatalysts, based upon oxide semiconductors, permit the conversion of solar energy into the chemical energy that is required for the oxidation of toxic organic compounds in water. The most promising photocatalyst is titanium dioxide, TiO2, and its solid solutions. The research on TiO2 photocatalysis is multidisciplinary, and progress in this area requires the application of concepts of catalysis and photocatalysis as well as concepts of solid-state chemistry.

Author : Alper Kinaci
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.94/5 ( download)

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Download or read book Molecular Level Assessment of Thermal Transport and Thermoelectricity in Materials: From Bulk Alloys to Nanostructures written by Alper Kinaci and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to manipulate material response to dynamical processes depends on the extent of understanding of transport properties and their variation with chemical and structural features in materials. In this perspective, current work focuses on the thermal and electronic transport behavior of technologically important bulk and nanomaterials. Strontium titanate is a potential thermoelectric material due to its large Seebeck coefficient. Here, first principles electronic band structure and Boltzmann transport calculations are employed in studying the thermoelectric properties of this material in doped and deformed states. The calculations verified that excessive carrier concentrations are needed for this material to be used in thermoelectric applications. Carbon- and boron nitride-based nanomaterials also offer new opportunities in many applications from thermoelectrics to fast heat removers. For these materials, molecular dynamics calculations are used to evaluate lattice thermal transport. To do this, first, an energy moment term is reformulated for periodic boundary conditions and tested to calculate thermal conductivity from Einstein relation in various systems. The influences of the structural details (size, dimensionality) and defects (vacancies, Stone-Wales defects, edge roughness, isotopic disorder) on the thermal conductivity of C and BN nanostructures are explored. It is observed that single vacancies scatter phonons stronger than other type of defects due to unsatisfied bonds in their structure. In pristine states, BN nanostructures have 4-6 times lower thermal conductivity compared to C counterparts. The reason of this observation is investigated on the basis of phonon group velocities, life times and heat capacities. The calculations show that both phonon group velocities and life times are smaller in BN systems. Quantum corrections are also discussed for these classical simulations. The chemical and structural diversity that could be attained by mixing hexagonal boron nitride and graphene provide further avenues for tuning thermal and electronic properties. In this work, the thermal conductivity of hybrid graphene/hexagonal-BN structures: stripe superlattices and BN (graphene) dots embedded in graphene (BN) are studied. The largest reduction in thermal conductivity is observed at 50% chemical mixture in dot superlattices. The dot radius appears to have little effect on the magnitude of reduction around large concentrations while smaller dots are more influential at dilute systems. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149458

Author : Mohsen Sheikholeslami Kandelousi
Publisher : BoD – Books on Demand
ISBN 13 : 9535130072
Total Pages : 286 pages
Book Rating : 4.79/5 ( download)

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Download or read book Nanofluid Heat and Mass Transfer in Engineering Problems written by Mohsen Sheikholeslami Kandelousi and published by BoD – Books on Demand. This book was released on 2017-03-15 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present book, nanofluid heat and mass transfer in engineering problems are investigated. The use of additives in the base fluid like water or ethylene glycol is one of the techniques applied to augment heat transfer. Newly, innovative nanometer-sized particles have been dispersed in the base fluid in heat transfer fluids. The fluids containing the solid nanometer-sized particle dispersion are called "nanofluids." At first, nanofluid heat and mass transfer over a stretching sheet are provided with various boundary conditions. Problems faced for simulating nanofluids are reported. Also, thermophysical properties of various nanofluids are presented. Nanofluid flow and heat transfer in the presence of magnetic field are investigated. Furthermore, applications for electrical and biomedical engineering are provided. Besides, applications of nanofluid in internal combustion engine are provided.