Download or read book Convection Heat Transfer from Cylinders in a Porous Medium Using the Two equation Energy Model written by Gazy Faissal Saloomy Al-Sumaily and published by . This book was released on 2013 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: This numerical study is directed at exploring the flow characteristics and thermal response for the flow over a circular cylinder(s) embedded in a horizontal packed bed under steady or unsteady forced convection. The analysis is made for an incompressible fluid flow through a two-dimensional bed, which consists of spherical particles that are packed randomly. The subproblems that are considered in the present study are: First, forced convective steady and pulsatile cross flows over a single cylinder placed in a porous bed. Where, for steady flow, the effects of the thermal and structural properties of the porous medium on the convective and conductive heat transfer to the fluid and solid phases, are examined. While, for pulsatile flow, the flow and heat transfer is investigated subject to a sinusoidally varying inlet flow, for both a non-filled and porous material filled channels. The effects of pulsation frequency and amplitude on heat transfer are quantified. Second, forced convective steady cross flow over multiple cylinders arranged in two staggered or in-line configurations, embedded in a porous bed.The focus is directed on how the spacing parameter between the cylinders affects heat transfer from each, at different thermal conductivity ratios and Reynolds numbers for both configurations.Specifically, the generalised momentum model, i.e., the Darcy-Brinkmann-Forchheimer (DBF) model, is employed to model the flow field. This takes into consideration the non-Darcian terms, such as inertial and viscous effects. Moreover, the energy transport within the solid and fluid phases is modelled using separate energy equations for each phase. This is sometimes called the Local Thermal Non-Equilibrium (LTNE) model, in that it makes no assumptions about local thermal equilibrium between phases. The additional convective heat transfer term between the fluid and solid phases, which emerges when using the two-phase model, is formulated using a documented empirical correlation. Furthermore, the thermal dispersion phenomenon due to the complex path of local fluid elements through the solid matrix, causing mixing and recirculation in both the longitudinal and the transverse directions, is incorporated in the modelling of the fluid phase energy equation.
Download or read book Principles of Heat Transfer in Porous Media written by M. Kaviany and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the empirical treatment of fluid flow and heat transfer in porous media is over a century old, only in the last three decades has the transport in these heterogeneous systems been addressed in detail. So far, single-phase flows in porous media have been treated or at least formulated satisfactorily, while the subject of two-phase flow and the related heat-transfer in porous media is still in its infancy. This book identifies the principles of transport in porous media and compares the avalaible predictions based on theoretical treatments of various transport mechanisms with the existing experimental results. The theoretical treatment is based on the volume-averaging of the momentum and energy equations with the closure conditions necessary for obtaining solutions. While emphasizing a basic understanding of heat transfer in porous media, this book does not ignore the need for predictive tools; whenever a rigorous theoretical treatment of a phenomena is not avaliable, semi-empirical and empirical treatments are given.
Download or read book Convective Heat Transfer written by I. Pop and published by Elsevier. This book was released on 2001-02-23 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in studying the phenomena of convective heat and mass transfer between an ambient fluid and a body which is immersed in it stems both from fundamental considerations, such as the development of better insights into the nature of the underlying physical processes which take place, and from practical considerations, such as the fact that these idealised configurations serve as a launching pad for modelling the analogous transfer processes in more realistic physical systems. Such idealised geometries also provide a test ground for checking the validity of theoretical analyses. Consequently, an immense research effort has been expended in exploring and understanding the convective heat and mass transfer processes between a fluid and submerged objects of various shapes. Among several geometries which have received considerable attention are plates, circular and elliptical cylinders, and spheres, although much information is also available for some other bodies, such as corrugated surfaces or bodies of relatively complicated shapes. The book is a unified progress report which captures the spirit of the work in progress in boundary-layer heat transfer research and also identifies potential difficulties and areas for further study. In addition, this work provides new material on convective heat and mass transfer, as well as a fresh look at basic methods in heat transfer. Extensive references are included in order to stimulate further studies of the problems considered. A state-of-the-art picture of boundary-layer heat transfer today is presented by listing and commenting also upon the most recent successful efforts and identifying the needs for further research.
Download or read book Compact Heat Exchangers written by Alexander Louis London and published by CRC Press. This book was released on 1990 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat exchangers are a crucial part of aerospace, marine, cryogenic and refrigeration technology. These essays cover such topics as complicated flow arrangements, complex extended surfaces, two-phase flow and irreversibility in heat exchangers, and single-phase heat transfer.
Download or read book Convection in Porous Media written by Donald A. Nield and published by Springer. This book was released on 2017-03-15 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Two D Heat Transfer Through Porous Media with Heat Generation written by and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigation develops an axisymmetric heat transfer-combustion model of a porous medium within a circular cylinder. System flow is governed by Darcy's law. Carbon and air properties are treated as variables of temperature. A combined continuity-Darcy equation, an oxygen mass balance equation, and energy balance equations (one each) for air and carbon, describe the conservation laws of the system. Transport mechanisms for oxygen mass transfer are molecular diffusion and convective transport, and an oxygen consumption term to account for combustion is included. Heat transfer mechanisms included in the model are conduction and convection. Radiation is accounted for at applicable boundaries only. Nonvolatile combustion is accounted for in the carbon energy and oxygen mass balance equations as a heat generation term of Arrhenius type. The numerical solution of four coupled, nonlinear, transient partial differential field equations is accomplished using the Galerkin formulation of the Finite Element Method. The effect of porosity of system behavior is examined. Additional keywords: Semenov model, and Numerical analysis.
Download or read book Two D Heat Transfer Through Porous Media with Heat Generation written by Benjamin Martinez (Jr.) and published by . This book was released on 1984 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigation develops an axisymmetric heat transfer-combustion model of a porous medium within a circular cylinder. System flow is governed by Darcy's law. Carbon and air properties are treated as variables of temperature. A combined continuity-Darcy equation, an oxygen mass balance equation, and energy balance equations (one each) for air and carbon, describe the conservation laws of the system. Transport mechanisms for oxygen mass transfer are molecular diffusion and convective transport, and an oxygen consumption term to account for combustion is included. Heat transfer mechanisms included in the model are conduction and convection. Radiation is accounted for at applicable boundaries only. Nonvolatile combustion is accounted for in the carbon energy and oxygen mass balance equations as a heat generation term of Arrhenius type. The numerical solution of four coupled, nonlinear, transient partial differential field equations is accomplished using the Galerkin formulation of the Finite Element Method. The effect of porosity of system behavior is examined. Additional keywords: Semenov model, and Numerical analysis.
Download or read book Analytical Method for Steady State Heat Transfer in Two dimensional Porous Media written by Robert Siegel and published by . This book was released on 1970 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Convective Heat Transfer in Porous Media written by Yasser Mahmoudi and published by CRC Press. This book was released on 2019-11-06 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on heat transfer in porous media, this book covers recent advances in nano and macro’ scales. Apart from introducing heat flux bifurcation and splitting within porous media, it highlights two-phase flow, nanofluids, wicking, and convection in bi-disperse porous media. New methods in modeling heat and transport in porous media, such as pore-scale analysis and Lattice–Boltzmann methods, are introduced. The book covers related engineering applications, such as enhanced geothermal systems, porous burners, solar systems, transpiration cooling in aerospace, heat transfer enhancement and electronic cooling, drying and soil evaporation, foam heat exchangers, and polymer-electrolyte fuel cells.
Download or read book Natural Convection Heat Transfer from Short Heated Cylinders in a Porous Medium written by Syed Kamal Qaisar-E-Haq and published by . This book was released on 1997 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulence in Porous Media written by Marcelo J.S. de Lemos and published by Elsevier. This book was released on 2012-06-25 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence in Porous Media introduces the reader to the characterisation of turbulent flow, heat and mass transfer in permeable media, including analytical data and a review of available experimental data. Such transport processes occurring a relatively high velocity in permeable media are present in a number of engineering and natural flows. This new edition features a completely updated text including two new chapters exploring Turbulent Combustion and Moving Porous Media. De Lemos has expertly brought together a text that compiles, details, compares and evaluates available methodologies for modelling and simulating flow, providing an essential tour for engineering students working within the field as well as those working in chemistry, physics, applied mathematics, and geological and environmental sciences. Brings together groundbreaking and complex research on turbulence in porous media Extends the original model to situations including reactive systems Now discusses movement of the porous matrix
Download or read book Transport Phenomena Around a Porous Cylinder written by Srinivas Budaraju and published by . This book was released on 1995 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Convective Transport of Power Law Fluid written by Rishi Raj Kairi and published by LAP Lambert Academic Publishing. This book was released on 2011-04 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of convection heat and mass transfer in a non-Newtonian fluid saturated porous medium has attracted many investigators due to its wide range of applications in geophysics and energy related problems. The effects like stratification, melting, double dispersion, dissipation, variable viscosity and radiation are important phenomena, understanding the effect of these on coupled convection in porous media is very important. In the existing literature, most of the researchers considered the porous media saturated with Newtonian fluid while studying aforesaid second order effects. This motivates to elaborate these second order effects in non- Newtonian fluid saturated non-Darcy porous media. This book aims at theoretical investigation of some of the above second order effects on natural and mixed convection heat transfer or coupled heat and mass transfer process by considering porous media saturated with non-Newtonian fluids. In each case, the non-dimensional governing equations are solved numerically by similarity and local non-similarity methods wherever applicable.
Download or read book Advances in Numerical Heat Transfer Volume 2 written by W. Minkowycz and published by Routledge. This book was released on 2018-12-13 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the advances in numerical heat transfer modeling by applying high-performance computing resources, striking a balance between generic fundamentals, specific fundamentals, generic applications, and specific applications.
Download or read book Two dimensional Analysis of Heat and Mass Transfer in Porous Media Using the Strongly Implicit Procedure written by Donald M. Curry and published by . This book was released on 1974 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanofluid Flow in Porous Media written by Mohsen Sheikholeslami Kandelousi and published by BoD – Books on Demand. This book was released on 2020-08-19 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of fluid flow and heat transfer in a porous medium have been the subject of continuous interest for the past several decades because of the wide range of applications, such as geothermal systems, drying technologies, production of thermal isolators, control of pollutant spread in groundwater, insulation of buildings, solar power collectors, design of nuclear reactors, and compact heat exchangers, etc. There are several models for simulating porous media such as the Darcy model, Non-Darcy model, and non-equilibrium model. In porous media applications, such as the environmental impact of buried nuclear heat-generating waste, chemical reactors, thermal energy transport/storage systems, the cooling of electronic devices, etc., a temperature discrepancy between the solid matrix and the saturating fluid has been observed and recognized.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
