[PDF] Wicking In Porous Materials eBook

Author : Reza Masoodi
Publisher : CRC Press
Page : 369 pages
File Size : 44,15 MB
Release : 2012-10-26
Category : Technology & Engineering
ISBN : 1439874336

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This reference offers information on the science and advances of wicking in porous materials. It describes various modeling approaches, traditional and modern, but maintains an emphasis on the modern methodologies. A host of internationally recognized scientists and researchers contribute chapters that describe the physics of wicking and the different approaches available for modeling wicking. Chapters cover measurement of wetting parameters such as surface tension and contact angle; the Washburn Equation; measurement of various quantities; wicking in rigid porous materials; wicking in swelling porous materials; and two-phase flow approaches to modeling wick flow.

Author : Yulia Grebenyuk
Publisher : Cuvillier Verlag
Page : 222 pages
File Size : 31,26 MB
Release : 2018-02-05
Category : Technology & Engineering
ISBN : 3736987277

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The aim of this work is to advance the knowledge on the behavior of fluids in porous materials. Wicking, or imbibition, is a spontaneous penetration of liquid into porous media due to capillary forces. Due to the challenges of the capillary transport of cryogenic liquids, the wicking of liquid nitrogen subjected to evaporation was of a special interest for this research. For that, a novel test facility was built to perform experiments in a one-species system under pre-defined non-isothermal conditions. Two one-dimensional macroscopic wicking models were proposed to evaluate the impact of the porous sample superheat, geometrical and structural characteristics as well as the impact of the vapor flow created due to evaporation. In the second part of this work, the capillary transport abilities of porous ceramic monoliths of anisotropic structure were studied. The polymer-derived ceramic samples fabricated with the freeze-casting method were characterized via vertical wicking tests. In the third part, the capillary transport properties of porous media and the wicking process were examined using the computational fluid dynamics software. The results of benchmark microscopic and macroscopic simulations may serve as a basis for further numerical investigations of fluid flow problems in porous media.

Author : Yasser Mahmoudi
Publisher : CRC Press
Page : 381 pages
File Size : 38,42 MB
Release : 2019-11-06
Category : Science
ISBN : 0429672047

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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.

Author : Peng Xu
Publisher : CRC Press
Page : 206 pages
File Size : 46,99 MB
Release : 2019-07-16
Category : Science
ISBN : 1351019201

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Heat and Mass Transfer in Drying of Porous Media offers a comprehensive review of heat and mass transfer phenomena and mechanisms in drying of porous materials. It covers pore-scale and macro-scale models, includes various drying technologies, and discusses the drying dynamics of fibrous porous material, colloidal porous media and size-distributed particle system. Providing guidelines for mathematical modeling and design as well as optimization of drying of porous material, this reference offers useful information for researchers and students as well as engineers in drying technology, food processes, applied energy, mechanical, and chemical engineering.

Author : Zhen (Leo) Liu
Publisher : Springer
Page : 431 pages
File Size : 22,18 MB
Release : 2018-07-12
Category : Technology & Engineering
ISBN : 3319930281

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This book summarizes, defines, and contextualizes multiphysics with an emphasis on porous materials. It covers various essential aspects of multiphysics, from history, definition, and scope to mathematical theories, physical mechanisms, and numerical implementations. The emphasis on porous materials maximizes readers’ understanding as these substances are abundant in nature and a common breeding ground of multiphysical phenomena, especially complicated multiphysics. Dr. Liu’s lucid and easy-to-follow presentation serve as a blueprint on the use of multiphysics as a leading edge technique for computer modeling. The contents are organized to facilitate the transition from familiar, monolithic physics such as heat transfer and pore water movement to state-of-the-art applications involving multiphysics, including poroelasticity, thermohydro-mechanical processes, electrokinetics, electromagnetics, fluid dynamics, fluid structure interaction, and electromagnetomechanics. This volume serves as both a general reference and specific treatise for various scientific and engineering disciplines involving multiphysics simulation and porous materials.

Author : Rachid Ababou
Publisher : John Wiley & Sons
Page : 420 pages
File Size : 42,50 MB
Release : 2019-02-06
Category : Technology & Engineering
ISBN : 1848215282

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Capillary phenomena occur in both natural and human-made systems, from equilibria in the presence of solids (grains, walls, metal wires) to multiphase flows in heterogeneous and fractured porous media. This book, composed of two volumes, develops fluid mechanics approaches for two immiscible fluids (water/air or water/oil) in the presence of solids (tubes, joints, grains, porous media). Their hydrodynamics are typically dominated by capillarity and viscous dissipation. This first volume presents the basic concepts and investigates two-phase equilibria, before analyzing two-phase hydrodynamics in discrete and/or statistical systems (tubular pores, planar joints). It then studies flows in heterogeneous and stratified porous media, such as soils and rocks, based on Darcy’s law. This analysis includes unsaturated flow (Richards equation) and two-phase flow (Muskat equations). Overall, the two volumes contain basic physical concepts, theoretical analyses, field investigations and statistical and numerical approaches to capillary-driven equilibria and flows in heterogeneous systems

Author : R. A. Farran
Publisher :
Page : 51 pages
File Size : 35,27 MB
Release : 1968
Category : Insulation (Heat)
ISBN :

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An experimental program was conducted to develop techniques for determining the wicking characteristics of nonrigid materials for potential use in heat pipes. The principal quantities of interest are effective pore size (to calculate a driving potential for capillary pumping of liquids) and permeability (to establish resistance to liquid flow). Compressible wicking materials do not readily lend themselves to some of the more conventional procedures used for determining flow properties as, e.g., in measuring permeability by forcing a liquid through a rigid, porous material after which flow rate and pressure drop measurements are used to calculate permeability. Consequently, other methods were investigated. Experiments were conducted with woven sleeving to determine the wicking characteristics mentioned above. Results of these tests are presented and compared with performance predicted from theory. (Author).

Author : Peng Xu
Publisher : CRC Press
Page : 210 pages
File Size : 38,91 MB
Release : 2019-07-16
Category : Science
ISBN : 135101921X

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Heat and Mass Transfer in Drying of Porous Media offers a comprehensive review of heat and mass transfer phenomena and mechanisms in drying of porous materials. It covers pore-scale and macro-scale models, includes various drying technologies, and discusses the drying dynamics of fibrous porous material, colloidal porous media and size-distributed particle system. Providing guidelines for mathematical modeling and design as well as optimization of drying of porous material, this reference offers useful information for researchers and students as well as engineers in drying technology, food processes, applied energy, mechanical, and chemical engineering.

Author : Doris Wolfe
Publisher : Nova Publishers
Page : 150 pages
File Size : 22,87 MB
Release : 2016-09
Category :
ISBN : 9781634854528

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This book provides research on theories, properties and applications of porous media. Chapter One considers non-standard models of multi-component adsorption with applications to gas adsorption processes in coalbeds. Chapter Two discusses the influence of temperature dependent thermal conductivity on non-darcy flow and heat transfer in a vertical rectangular duct. Chapter Three investigates the effects of different modes of evaporation on the time-dependent wicking behavior of liquids into a porous strip. Chapter Four deals with the study of dispersion of a solute for porous medium in a vertical double-passage channel with first order chemical reaction. Chapter Five investigates the effect of partial slip viscous flow over a stretching sheet with suction/injection in a porous medium. In Chapter Six, the onset of nanofluid convection in a Walters B fluid-saturated horizontal porous layer is studied.