convection in porous media

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Convection In Porous Media

Author : Donald A. Nield
ISBN : 9783319495620
Genre : Technology & Engineering
File Size : 42. 77 MB
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This updated edition of a widely admired text provides a user-friendly introduction to the field that requires only routine mathematics. The book starts with the elements of fluid mechanics and heat transfer, and covers a wide range of applications from fibrous insulation and catalytic reactors to geological strata, nuclear waste disposal, geothermal reservoirs, and the storage of heat-generating materials. As the standard reference in the field, this book will be essential to researchers and practicing engineers, while remaining an accessible introduction for graduate students and others entering the field. The new edition features 2700 new references covering a number of rapidly expanding fields, including the heat transfer properties of nanofluids and applications involving local thermal non-equilibrium and microfluidic effects.

Convective Heat And Mass Transfer In Porous Media

Author : Sadik Kakaç
ISBN : 9789401132206
Genre : Science
File Size : 43. 44 MB
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The rapid growth of literature on convective heat and mass transfer through porous media has brought both engineering and fundamental knowledge to a new state of completeness and depth. Additionally, several new questions of fundamental merit have arisen in several areas which bear direct relation to further advancement of basic knowledge and applications in this field. For example, the growth of fundamental heat transfer data and correlations for engineering use for saturated media has now reached the point where the relations for heat transfer coefficients and flow parameters are known well enough for design purposes. Multiple flow field regimes in natural convection have been identified in several important enclosure geometries. New questions have arisen on the nature of equations being used in theoretical studies, i. e. , the Validity of Darcy assumption is being brought into question; Wall effects in high and low velocity flow fields have been found to play a role in predicting transport coefficients; The formulation of transport problems in fractured media are being investigated as both an extension of those in a homogeneous medium and for application in engineering systems in geologic media and problems on saturated media are being addressed to determine their proper formulation and solution. The long standing problem of how to adequately formulate and solve problems of multi-phase heat and mass transfer in heterogeneous media is important in the technologies of chemical reactor engineering and enhanced oil recovery.

Thermochemical Convection In Porous Media

Author : Stan Schoofs
ISBN : STANFORD:36105028949340
Genre : Science
File Size : 32. 29 MB
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Advances In Transport Phenomena In Porous Media

Author : Jacob Bear
ISBN : 9789400936256
Genre : Technology & Engineering
File Size : 79. 74 MB
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This volume contains the lectures presented at the NATO ADVANCED STUDY INSTITUTE that took place at Newark, Delaware, U. S. A. , July 14-23, 1985. The objective of this meeting was to present and discuss selected topics associated with transport phenomena in porous media. By their very nature, porous media and phenomena of transport of extensive quantities that take place in them, are very complex. The solid matrix may be rigid, or deformable (elastically, or following some other constitutive relation), the void space may be occupied by one or more fluid phases. Each fluid phase may be composed of more than one component, with the various components capable of interacting among themselves and/or with the solid matrix. The transport process may be isothermal or non-isothermal, with or without phase changes. Porous medium domains in which extensive quantities, such as mass of a fluid phase, component of a fluid phase, or heat of the porous medium as a whole, are being transported occur in the practice in a variety of disciplines.

Transport Phenomena In Porous Media Iii

Author : Derek B Ingham
ISBN : 0080543189
Genre : Science
File Size : 66. 14 MB
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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.

Handbook Of Porous Media Second Edition

Author : Kambiz Vafai
ISBN : 9780415876384
Genre : Technology & Engineering
File Size : 59. 28 MB
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Over the last three decades, advances in modeling flow, heat, and mass transfer through a porous medium have dramatically transformed engineering applications. Comprehensive and cohesive, Handbook of Porous Media, Second Edition presents a compilation of research related to heat and mass transfer including the development of practical applications for analysis and design of engineering devices and systems involving porous media. See what's new in the Second Edition: Recent studies related to current and future challenges and developments in fundamental aspects of porous media Combustion and heat transfer in inert porous media Modeling bioconvection in porous media Influence of vibrations on the onset of the thermo-convection Modeling porous media impairment by particles Modeling liquid composites molding processes Parameter identification within a porous medium using genetic algorithms Viscous dissipation Forced and double diffusive convection in porous media Turbulent flow Dispersion Particle migration and deposition in porous media Dynamic modeling of convective transport through porous media Completely revised, updated, and reviewed by experts in the field, each chapter includes, whenever applicable, a discussion of the pertinent aspects of experimental work or numerical techniques. Generously illustrated with 262 black and white illustrations, 15 tables, and 1,865 equations, the book is a rigorous and thorough working reference.

Scaling Of Solutal Convection In Porous Media

Author : Yu Liang (Ph. D.)
ISBN : OCLC:1032619707
Genre :
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Convective dissolution trapping is an important mechanism for CO2 mitigation because of its high security and long-term storage capacity. This process is a problem of solutal convection in porous media, which is a classic example of symmetry breaking and pattern formation. The convective solute flux and geometry of the convective pattern are thought to be controlled by the molecular Rayleigh number, Ram, i.e., the ratio of the buoyant driving forces over diffusive dissipation. The dimensionless convective solute flux, Sh (Sherwood number), is thought to increase with Ram approximately linearly, as [mathematical formula]. The spacing of the convective fingers, [delta], relative to the domain height, H, is thought to decrease approximately as [mathematical formula]. However, there is little experimental verification of these fundamental scaling laws for solutal convection in porous media. To understand the controlling physics of CO2 convective dissolution in aquifers and verify relevant fundamental scaling laws, I conduct convective dissolution experiments using analog fluids in a porous medium. By changing the controlling parameters, including permeability and maximum density difference, corresponding convective velocity, dissolution flux, and finger pattern are measured for each combination. The experimental results shows that these fundamental scaling laws do not hold for the experiments in porous media composed of glass beads. Instead, I observe that the dissolution flux levels off as Ram increases and that the finger spacing increases rather than decreases with increasing Ram. The classic scaling analysis breaks down because it does not consider the dominant dissipative mechanism in porous media, mechanical dispersion. Its influence on convection is captured by a dispersive Rayleigh number, [mathematical equation], where [alpha] [subscript T] is the transverse dispersivity. In experimental studies, dispersion dominates molecular diffusion, i.e., [mathematical equation] and therefore selects the finger spacing. Increasing the bead size of the porous medium increases Ram but decreases Rad, leading to a coarsening of the convective pattern. The dissolution flux is controlled by Ram, which captured the buoyant driving force in the convection. However, the inherent anisotropy of mechanical dispersion leads to an asymmetry in the convective pattern that eventually limits the dissolution flux in the high Ram limit, resulting in the breakdown of the classic convective solute flux scaling. This anisotropy induced asymmetry and corresponding flux reduction are verified by a numerical simulation study. The results show that mechanical dispersion, which was ignored before, plays an important role in quantifying solutal convection in porous media. Since dispersivity generally increases with the scale of observations, knowledge obtained from the counter-intuitive results can be applied to predict mass transfer in large-scale applications such as CO2 convective dissolution storage in aquifers.

Transport Phenomena In Porous Media

Author : Derek B Ingham
ISBN : 9780080543192
Genre : Technology & Engineering
File Size : 64. 81 MB
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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.

Fluid Flow And Heat Transfer In Rotating Porous Media

Author : Peter Vadasz
ISBN : 9783319200569
Genre : Science
File Size : 36. 41 MB
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This Book concentrates the available knowledge on rotating fluid flow and heat transfer in porous media in one single reference. Dr. Vadasz develops the fundamental theory of rotating flow and heat transfer in porous media and introduces systematic classification and identification of the relevant problems. An initial distinction between rotating flows in isothermal heterogeneous porous systems and natural convection in homogeneous non-‐isothermal porous systems provides the two major classes of problems to be considered. A few examples of solutions to selected problems are presented, highlighting the significant impact of rotation on the flow in porous media.

Transport Phenomena In Porous Media Ii

Author : I. Pop
ISBN : 0080543170
Genre : Technology & Engineering
File Size : 41. 71 MB
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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.

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