Download or read book Liquid and Vapor Transport Phenomena in Microstructured Porous Media for High Heat Flux Cooling Applications written by Chi Zhang and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rising power densities have presented thermal management challenges to a number of industrial applications such as power electronics, laser diodes, microprocessors, and defense and space systems. Many micro- and power-electronics systems are facing difficult challenges of dissipating extremely high heat flux over 1 kW cm-2 while maintaining the component temperature below an application-driven maximum temperature. Capillary-driven evaporation and boiling from porous metal wicks has attracted increased attention due to its passive liquid delivery via capillary wicking and the potential of dissipating concentrated heat fluxes. Advances in fabrication technology have enabled the design of capillary wicking structures with microscale features. This work examines the fundamental liquid and vapor transport phenomena in microstructured porous wicks during liquid-to-vapor phase-change processes, which is essential to wick design optimization in high-performance two-phase heat sinks and heat exchangers. First, we utilize a template-assisted copper electrodeposition method to synthesis copper inverse opal structures that consist of uniform pores with three-dimensional periodicity. We demonstrate the ability to tailor the fluid permeability of microporous inverse opal structures by varying the sintering process of the sacrificial template. This template modification allows more than an order of magnitude increase in permeability associated with the widening of necks between adjacent pores of the copper structure. The ability to tune permeability of copper inverse opals for fixed feature sizes provides a useful design parameter for two-phase electronic cooling systems using porous metals as wicking structures. Second, we investigate capillary-driven boiling in copper inverse opal wicks with passive delivery of working fluid via a capillary feed. We develop a semi-analytical model to correlate key transport mechanisms to the maximum heat flux before severe heat transfer degradation occurs, including capillary wicking of liquid supply and vapor departure from the porous structures. Both experimental results and the model show a capillary-limited regime where the maximum heat flux increases as the liquid wicking distance decreases and a boiling-limited regime where further decrease in liquid wicking distance fails to significantly improve the heat dissipation capability. An optimal wick thickness can be determined based on competing transport mechanisms between liquid wicking and vapor venting within the microporous wicks. Our model assists to better understand liquid and vapor transport of capillary-driven boiling from microstructured porous metals and provide useful guidelines to wicking structure design of high-performance two-phase cooling systems. Third, we utilize copper inverse opal wicks as a platform to examine evaporation phase-change process from free liquid menisci formed on top of the wicks prior to boiling incipience. We demonstrate that evaporation in an air ambient is dominated by vapor diffusion in vapor-air mixture driven by concentration gradients and convective bulk flow. The heat and mass transfer across the liquid-vapor interface is diffusion limited as governed by the Maxwell-Stefan equation. Reducing the evaporator feature size is shown to be effective in improving evaporation flux by decreasing the diffusion boundary layer thickness. To reduce vapor diffusion resistance and promote interfacial transport during evaporation, eliminating the presence of air to create pure vapor environment should be considered.
Download or read book Transport Phenomena in Porous Media III written by Derek B Ingham and published by Elsevier. This book was released on 2005-07-29 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid and flow problems in porous media have attracted the attention of industrialists, engineers and scientists from varying disciplines, such as chemical, environmental, and mechanical engineering, geothermal physics and food science. There has been a increasing interest in heat and fluid flows through porous media, making this book a timely and appropriate resource.Each chapter is systematically detailed to be easily grasped by a research worker with basic knowledge of fluid mechanics, heat transfer and computational and experimental methods. At the same time, the readers will be informed of the most recent research literature in the field, giving it dual usage as both a post-grad text book and professional reference.Written by the recent directors of the NATO Advanced Study Institute session on 'Emerging Technologies and Techniques in Porous Media' (June 2003), this book is a timely and essential reference for scientists and engineers within a variety of fields.
Download or read book Porous Fluids written by Vallampati Ramachandra Prasad and published by BoD – Books on Demand. This book was released on 2021-08-18 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by authoritative experts in the field, this book discusses fluid flow and transport phenomena in porous media. Portions of the book are devoted to interpretations of experimental results in this area and directions for future research. It is a useful reference for applied mathematicians and engineers, especially those working in the area of porous media.
Download or read book Modeling Transport Phenomena in Porous Media with Applications written by Malay K. Das and published by Springer. This book was released on 2017-11-21 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an ensemble of six major chapters, an introduction, and a closure on modeling transport phenomena in porous media with applications. Two of the six chapters explain the underlying theories, whereas the rest focus on new applications. Porous media transport is essentially a multi-scale process. Accordingly, the related theory described in the second and third chapters covers both continuum‐ and meso‐scale phenomena. Examining the continuum formulation imparts rigor to the empirical porous media models, while the mesoscopic model focuses on the physical processes within the pores. Porous media models are discussed in the context of a few important engineering applications. These include biomedical problems, gas hydrate reservoirs, regenerators, and fuel cells. The discussion reveals the strengths and weaknesses of existing models as well as future research directions.
Download or read book Transport Phenomena in Porous Media written by Derek B Ingham and published by Elsevier. This book was released on 1998-09-07 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research into thermal convection in porous media has substantially increased during recent years due to its numerous practical applications. These problems have attracted the attention of industrialists, engineers and scientists from many very diversified disciplines, such as applied mathematics, chemical, civil, environmental, mechanical and nuclear engineering, geothermal physics and food science. Thus, there is a wealth of information now available on convective processes in porous media and it is therefore appropriate and timely to undertake a new critical evaluation of this contemporary information. Transport Phenomena in Porous Media contains 17 chapters and represents the collective work of 27 of the world's leading experts, from 12 countries, in heat transfer in porous media. The recent intensive research in this area has substantially raised the expectations for numerous new practical applications and this makes the book a most timely addition to the existing literature. It includes recent major developments in both the fundamentals and applications, and provides valuable information to researchers dealing with practical problems in thermal convection in porous media. Each chapter of the book describes recent developments in the highly advanced analytical, numerical and experimental techniques which are currently being employed and discussions of possible future developments are provided. Such reviews not only result in the consolidation of the currently available information, but also facilitate the identification of new industrial applications and research topics which merit further work.
Download or read book Transport Phenomena in Porous Media II written by I. Pop and published by Elsevier. This book was released on 2002-06-20 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport phenomena in porous media continues to be a field which attracts intensive research activity. This is primarily due to the fact that it plays an important and practical role in a large variety of diverse scientific applications. Transport Phenomena in Porous Media II covers a wide range of the engineering and technological applications, including both stable and unstable flows, heat and mass transfer, porosity, and turbulence.Transport Phenomena in Porous Media II is the second volume in a series emphasising the fundamentals and applications of research in porous media. It contains 16 interrelated chapters of controversial, and in some cases conflicting, research, over a wide range of topics. The first volume of this series, published in 1998, met with a very favourable reception. Transport Phenomena in Porous Media II maintains the original concept including a wide and diverse range of topics, whilst providing an up-to-date summary of recent research in the field by its leading practitioners.
Download or read book Handbook of Porous Media written by Kambiz Vafai and published by CRC Press. This book was released on 2015-06-23 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Porous Media, Third Edition offers a comprehensive overview of the latest theories on flow, transport, and heat-exchange processes in porous media. It also details sophisticated porous media models which can be used to improve the accuracy of modeling in a variety of practical applications. Featuring contributions from leading experts i
Download or read book Porous Media Transport Phenomena written by Faruk Civan and published by John Wiley & Sons. This book was released on 2011-07-18 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book that makes transport in porous media accessible to students and researchers alike Porous Media Transport Phenomena covers the general theories behind flow and transport in porous media a solid permeated by a network of pores filled with fluid which encompasses rocks, biological tissues, ceramics, and much more. Designed for use in graduate courses in various disciplines involving fluids in porous materials, and as a reference for practitioners in the field, the text includes exercises and practical applications while avoiding the complex math found in other books, allowing the reader to focus on the central elements of the topic. Covering general porous media applications, including the effects of temperature and particle migration, and placing an emphasis on energy resource development, the book provides an overview of mass, momentum, and energy conservation equations, and their applications in engineered and natural porous media for general applications. Offering a multidisciplinary approach to transport in porous media, material is presented in a uniform format with consistent SI units. An indispensable resource on an extremely wide and varied topic drawn from numerous engineering fields, Porous Media Transport Phenomena includes a solutions manual for all exercises found in the book, additional questions for study purposes, and PowerPoint slides that follow the order of the text.
Download or read book Handbook of Porous Media Third Edition written by Kambiz Vafai and published by CRC Press. This book was released on 2015-07-06 with total page 959 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Porous Media, Third Edition offers a comprehensive overview of the latest theories on flow, transport, and heat-exchange processes in porous media. It also details sophisticated porous media models which can be used to improve the accuracy of modeling in a variety of practical applications. Featuring contributions from leading experts in their respective fields, this book: Presents the general characteristics and modeling of porous media, such as multiscale modeling of porous media, two-phase flow, compressible porous media, and dispersion in porous media Addresses the fundamental topics of transport in porous media, including theoretical models of transport, membrane transport phenomena, modeling transport properties, and transport in biomedical applications Describes several important aspects of turbulence in porous media, including advances in modeling turbulence phenomena in heterogeneous porous media Explores heat transfer of nanofluids as well as thermal transport in porous media, including forced convection, double diffusive convection, high-heat flux applications, and thermal behavior of poroelastic media Covers geological applications in porous media, including modeling and experimental challenges related to oil fields, CO2 migration, groundwater flows, and velocity measurements Discusses relevant attributes of experimental work or numerical techniques whenever applicable Paving the way for the establishment of multidisciplinary areas of research, Handbook of Porous Media, Third Edition further enhances cooperation between engineers and scientists by providing a valuable reference for addressing some of the most challenging issues in engineering and the hydrogeological, biological, and biomedical sciences.
Download or read book Modeling and Applications of Transport Phenomena in Porous Media written by and published by . This book was released on 1988 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emerging Technologies and Techniques in Porous Media written by Derek B. Ingham and published by Springer Science & Business Media. This book was released on 2004-02-29 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of heat and fluid flow in fluid-saturated porous media is applicable in a very wide range of fields, with practical applications in modern industry and environmental areas, such as nuclear waste management, the construction of thermal insulators, geothermal power, grain storage and many more. The vast amount of theoretical and experimental work reported has attracted the attention of industrialists, engineers, applied mathematicians, chemical, civil, environmental, mechanical and nuclear engineers, physicists, food scientists, medical researchers, etc. This book covers the full range of theoretical, computational and experimental approaches to the subject, grouped into reviews of: fundamentals, stability, anisotropy, permeability and non-equilibrium, applications, and experimental porous media.
Download or read book Microchannel Phase Change Transport Phenomena written by Sujoy Kumar Saha and published by Butterworth-Heinemann. This book was released on 2015-09-27 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microchannel Heat transfer is the cooling application of high power density microchips in the CPU system, micropower systems and many other large scale thermal systems requiring effective cooling capacity. This book offers the latest research and recommended models on the microsize cooling system which not only significantly reduces the weight load, but also enhances the capability to remove much greater amount of heat than any of large scale cooling systems. A detailed reference in microchannel phase change (boiling and condensation) including recommended models and correlations for various requirements such as pressure loss, and heat transfer coefficient. Researchers, engineers, designers and students will benefit from the collated, state-of-the-art of the research put together in this book and its systematic, addressing all the relevant issues and providing a good reference for solving problems of critical analysis. - Up-to-date information will help delineate further research direction in the microchannel heat transfer - The latest modeling information and recommendations will help in design method and purpose
Download or read book Porous Media Fluid Transport and Pore Structure written by F Dullien and published by Elsevier. This book was released on 2012-12-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porous Media: Fluid Transport and Pore Structure presents relevant data on the role of pore structure in terms of transport phenomena in pore spaces. The information is then applied to the interpretation of various experiments and results of model calculations. This book emphasizes the discussion of ""flow through porous media"" in terms of interactions among the three main factors. These factors are transport phenomena, interfacial effects, and pore structure. An introductory chapter opens the text and presents some of the basic concepts and terms that will be encountered all throughout. Chapters 2 to 4 focus on the important foundations of the physical phenomena as applied in the pore space of porous media. These foundations are capillarity, pore structure, and single phase flow and diffusion. Chapters 5 to 7 discuss more in detail the different applications of pore structure to various operations and processes. Some of the concepts covered in this part of the book include flow and/or diffusion through a porous medium, simultaneous flow of immiscible fluids and immiscible displacement, and miscible displacement and hydrodynamic dispersion. This book is a good reference to students, scientists, and engineers in the field of chemistry, physics, and biology.
Download or read book Porous and Complex Flow Structures in Modern Technologies written by Adrian Bejan and published by Springer Science & Business Media. This book was released on 2004-04-29 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porous and Complex Flow Structures in Modern Technologies represents a new approach to the field, considering the fundamentals of porous media in terms of the key roles played by these materials in modern technology. Intended as a text for advanced undergraduates and as a reference for practicing engineers, the book uses the physics of flows in porous materials to tie together a wide variety of important issues from such fields as biomedical engineering, energy conversion, civil engineering, electronics, chemical engineering, and environmental engineering. Thus, for example, flows of water and oil through porous ground play a central role in energy exploration and recovery (oil wells, geothermal fluids), energy conversion (effluents from refineries and power plants), and environmental engineering (leachates from waste repositories). Similarly, the demands of miniaturization in electronics and in biomedical applications are driving research into the flow of heat and fluids through small-scale porous media (heat exchangers, filters, gas exchangers). Filters, catalytic converters, the drying of stored grains, and a myriad of other applications involve flows through porous media. By providing a unified theoretical framework that includes not only the traditional homogeneous and isotropic media but also models in which the assumptions of representative elemental volumes or global thermal equilibrium fail, the book provides practicing engineers the tools they need to analyze complex situations that arise in practice. This volume includes examples, solved problems and an extensive glossary of symbols.
Download or read book Modelling of Flow and Transport in Fractal Porous Media written by Jianchao Cai and published by Elsevier. This book was released on 2020-11-20 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important resource explores recent theoretical advances and modelling on fluids transport in fractal porous systems and presents a systematic understanding of the characterization of complex microstructure and transport mechanism in fractal porous media. Modelling of Flow and Transport in Fractal Porous Media shows how fractal theory and technology, combined with other modern experiments and numerical simulation methods, will assist researchers and practitioners in modelling of transport properties of fractal porous media, such as fluid flow, heat and mass transfer, mechanical characteristics, and electrical conductivity. Presents the main methods and technologies for transport characterization of fractal porous media, including soils, reservoirs and artificial materials Provides the most recent theoretical advances in modelling of fractal porous media, including gas and vapor transport in fibrous materials, nonlinear seepage flow in hydrocarbon reservoirs, mass transfer of porous nanofibers, and fractal mechanics of unsaturated soils Includes multidisciplinary examples of applications of fractal theory to aid researchers and practitioners in characterizing various porous media structures
Download or read book Transport Phenomena in Porous Media II written by Derek B. Ingham and published by Pergamon Press. This book was released on 2002 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport phenomena in porous media continues to be a field which attracts intensive research activity. This is primarily due to the fact that it plays an important and practical role in a large variety of diverse scientific applications. Transport Phenomena in Porous Media II covers a wide range of the engineering and technological applications, including both stable and unstable flows, heat and mass transfer, porosity, and turbulence. Transport Phenomena in Porous Media II is the second volume in a series emphasising the fundamentals and applications of research in porous media. It contains 16 interrelated chapters of controversial, and in some cases conflicting, research, over a wide range of topics. The first volume of this series, published in 1998, met with a very favourable reception. Transport Phenomena in Porous Media II maintains the original concept including a wide and diverse range of topics, whilst providing an up-to-date summary of recent research in the field by its leading practitioners.
Download or read book Advances of Heat Transfer in Porous Media written by Moghtada Mobedi and published by Mdpi AG. This book was released on 2023-06-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reprint is a collection of recent advanced studies in the field of heat and fluid flow in porous media. The pore size of the studied porous media in this reprint starts from a nanoscale, and the applications include the drying process of materials such as clay and lentil grain as well as the enhancement of heat transfer by using high thermal conductive porous media such as metal foams and stacked woven wire mesh. The use of a suitable porous structure for helium gas cooling under high heat flux conditions of a nuclear fusion divertor is an interesting application of porous structures for heat transfer enhancement, which is discussed in this reprint. A method for the trade-off thermo-hydrodynamic performance of a porous medium, which is an important issue for heat transfer enhancement, is also discussed. In the performed numerical studies, different methods such as finite volume method, lumped analysis and molecular dynamics are employed. Heat and mass transfer in structural ceramic blocks is analyzed by an analytical and phenomenological approach. All chapters of this reprint are advanced studies including wide application areas of porous media as well as interesting computational models that are useful for the researchers in the field of "Heat Transfer in Porous Media".
