Wicking in Porous Materials

Traditional and Modern Modeling Approaches

Author: Reza Masoodi,Krishna M. Pillai

Publisher: CRC Press

ISBN: 1439874328

Category: Technology & Engineering

Page: 380

View: 6737

A comprehensive presentation of wicking models developed in academia and industry, Wicking in Porous Materials: Traditional and Modern Modeling Approaches contains some of the most important approaches and methods available, from the traditional Washburn-type models to the latest Lattice-Boltzmann approaches developed during the last few years. It provides a sound conceptual framework for learning the science behind different mathematical models while at the same time being aware of the practical issues of model validation as well as measurement of important properties and parameters associated with various models. Top experts in the field reveal the secrets of their wicking models. The chapters cover the following topics: Wetting and wettability Darcy’s law for single- and multi-phase flows Traditional capillary models, such as the Washburn-equation based approaches Unsaturated-flow based methodologies (Richard’s Equation) Sharp-front (plug-flow) type approaches using Darcy’s law Pore network models for wicking after including various micro-scale fluid-flow phenomena Studying the effect of evaporation on wicking using pore network models Fractal-based methods Modeling methods based on mixture theory Lattice-Boltzmann method for modeling wicking in small scales Modeling wicking in swelling and non-rigid porous media This extensive look at the modeling of porous media compares various methods and treats traditional topics as well as modern technologies. It emphasizes experimental validation of modeling approaches as well as experimental determination of model parameters. Matching models to particular media, the book provides guidance on what models to use and how to use them.

Capillary Flows in Heterogeneous and Random Porous Media

Author: Rachid Ababou

Publisher: John Wiley & Sons

ISBN: 1848215282

Category: Science

Page: 402

View: 7576

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

Thermal and Moisture Transport in Fibrous Materials

Author: N Pan,P Gibson

Publisher: Woodhead Publishing

ISBN: 1845692268

Category: Technology & Engineering

Page: 632

View: 6975

The transfer of heat and moisture through textiles is vital to the manufacture and design of clothing, technical and protective textiles. Continued advances in textile processing technology, the growth of manufactured nonwovens and the application of nanotechnology have resulted in a wealth of research in order to characterise the behaviour of these materials. Thermal and moisture transport in fibrous materials provides a comprehensive guide of the technological developments and scientific understanding in this area. The first section summarises the structure, geometry and stereology of fibrous materials. The fundamentals of wetting and its dynamics are also discussed. Part two analyses thermal and liquid interactions in textiles and offers insights into the thermodynamic behaviour of moisture as well as heat and moisture coupling. The book concludes with chapters on the human thermoregulatory system, interfacing between fibrous materials and the human body and innovative computer modelling simulations. Thermal and moisture transport in fibrous materials is an essential reference for all those involved in the textile industry, especially those concerned with the design and manufacture of technical textiles and protective clothing. Summarises the structure, geometry and stereology of fibrous materials Discusses the fundamentals of wetting and its dynamics Analyses thermal and liquid interactions in textiles

Multiphase transport in porous media, 1991

presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Atlanta, Georgia, December 1-6, 1991

Author: R. R. Eaton,American Society of Mechanical Engineers. Winter Meeting,American Society of Mechanical Engineers. Fluids Engineering Division,American Society of Mechanical Engineers. Heat Transfer Division

Publisher: N.A


Category: Science

Page: 125

View: 2221


Porous Media

Theory, Properties and Applications

Author: Doris Wolfe

Publisher: Nova Publishers

ISBN: 9781634854528


Page: 150

View: 7054

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.

Vinyl Compounds—Advances in Research and Application: 2013 Edition


Author: N.A

Publisher: ScholarlyEditions

ISBN: 1481681176

Category: Science

Page: 797

View: 2193

Vinyl Compounds—Advances in Research and Application: 2013 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about ZZZAdditional Research in a concise format. The editors have built Vinyl Compounds—Advances in Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about ZZZAdditional Research in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Vinyl Compounds—Advances in Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Surface and Interfacial Tension

Measurement, Theory, and Applications

Author: Stanley Hartland

Publisher: CRC Press

ISBN: 0824751361

Category: Science

Page: 1500

View: 2017

This edited volume offers complete coverage of the latest theoretical, experimental, and computer-based data as summarized by leading international researchers. It promotes full understanding of the physical phenomena and mechanisms at work in surface and interfacial tensions and gradients, their direct impact on interface shape and movement, and their significance to numerous applications. Assessing methods for the accurate measurement of surface tension, interfacial tension, and contact angles, Surface and Interfacial Tension presents modern simulations of complex interfacial motions, such as bubble motion in liquids, and authoritatively illuminates bubble nucleation and detachment.

Contact angle, wettability and adhesion

festschrift in honor of Professor Robert J. Good

Author: K. L. Mittal

Publisher: V.S.P. Intl Science

ISBN: 9789067641579

Category: Science

Page: 971

View: 6268

This book chronicles the proceedings of the Symposium on Contact Angle, Wettability and Adhesion held in honor of Professor Robert J. Good at the American Chemical Society meeting in San Francisco, 6--10 April 1992. The book opens with a description of the professional and personal life of Professor Good, followed by 62 papers divided into four parts. The topics covered include: Contact angle, wettability and adhesion: a critical review (by Professor Good himself); capillary rise of a liquid on a solid (by Professor de Gennes, 1991 Physics Nobel Laureate); various factors influencing contact angle measurements; surface roughness effects in wetting phenomena; microscopic studies of static and dynamic contact angles; contact angles on plates and thin fibers; wettability behavior and surface characterization of various materials; wettability of pharmaceutical powders; wettability of wood; wetting properties of monolayers; control of wettability of polymers using organic surface chemistry; polymer surface modification and wettability; relevance of wettability in adhesion; wettability and bioadhesion; role of water wettability, water transport and adhesion in vision; wettability and adhesion in metal-ceramic systems; relevance of wetting in the control of dust during coal mining.

Rotating Machinery Vibration

From Analysis to Troubleshooting

Author: Maurice L. Adams

Publisher: CRC Press

ISBN: 9780203902165

Category: Technology & Engineering

Page: 376

View: 2958

This comprehensivereference/text provides a thorough grounding in the fundamentals of rotating machinery vibration-treating computer model building, sources and types of vibration, and machine vibration signal analysis. Illustrating turbomachinery, vibration severity levels, condition monitoring, and rotor vibration cause identification, Rotating Machinery Vibration Provides a primer on vibration fundamentals Highlights calculation of rotor unbalance response and rotor self-excited vibration Demonstrates calculation of rotor balancing weights Furnishes PC codes for lateral rotor vibration analyses Treats bearing, seal, impeller, and blade effects on rotor vibration Describes modes, excitation, and stability of computer models Includes extensive PC data coefficient files on bearing dynamics Providing comprehensive descriptions of vibration symptoms for rotor unbalance, dynamic instability, rotor-stator rubs, misalignment, loose parts, cracked shafts, and rub-induced thermal bows, Rotating Machinery Vibration is an essential reference for mechanical, chemical, design, manufacturing, materials, aerospace, and reliability engineers; and specialists in vibration, rotating machinery, and turbomachinery; and an ideal text for upper-level undergraduate and graduate students in these disciplines.