Studies on the Mechanics of Rapidly Flowing Granular-fluid Materials PDF Download
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Author: Daniel Martin Hanes
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 308
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Book Description
This work addresses the subset of flows of granular materials known as rapidly flowing, granular-fluid materials. Experiments were conducted in an annular, parallel plate shear cell with two primary goals in mind. The first was to investigate the existence of an internal boundary above which the material deformed rapidly, but below which the material remained rigidly locked in place. The second goal was to examine the constitutive behavior of rapidly flowing granular-fluid materials bounded by parallel, roughened plates. The constitutive theories of McTigue (1979) and Jenkins and Savage (1983) are applied to study the steady, rapid flow of a semi-infinite granular bed under the influence of gravity and traction applied to its surface. Analytic solutions based upon McTigue's theory and numerical solutions based upon Jenkins and Savage's theory both suggest that there is a finite thickness of motion in the bed.
Author: Daniel Martin Hanes
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 308
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Book Description
This work addresses the subset of flows of granular materials known as rapidly flowing, granular-fluid materials. Experiments were conducted in an annular, parallel plate shear cell with two primary goals in mind. The first was to investigate the existence of an internal boundary above which the material deformed rapidly, but below which the material remained rigidly locked in place. The second goal was to examine the constitutive behavior of rapidly flowing granular-fluid materials bounded by parallel, roughened plates. The constitutive theories of McTigue (1979) and Jenkins and Savage (1983) are applied to study the steady, rapid flow of a semi-infinite granular bed under the influence of gravity and traction applied to its surface. Analytic solutions based upon McTigue's theory and numerical solutions based upon Jenkins and Savage's theory both suggest that there is a finite thickness of motion in the bed.
Author: Etienne Guyon
Publisher: MIT Press
ISBN: 026204370X
Category : Technology & Engineering
Languages : en
Pages : 270
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Book Description
Explaining the science contained in a simple assembly of grains—the most abundant form of matter present on Earth. Granular media—composed of vast amounts of grains, consolidated or not—constitute the most abundant form of solid matter on Earth. Granular materials assemble in disordered configurations scientists often liken to a bag of marbles. Made of macroscopic particles rather than molecules, they defy the standard scheme of classification in terms of solid, liquid, and gas. Granular materials provide a model relevant to various domains of research, including engineering, physics, and biology. William Blake famously wished “To See a World in a Grain of Sand”; in this book, pioneering researchers in granular matter explain the science hidden behind simple grains, shedding light on collective behavior in disordered settings in general. The authors begin by describing the single grain with its different origins, shapes, and sizes, then examine grains in piled or stacked form. They explain the packing fraction of granular media, a crucial issue that bears on the properties displayed in practical applications; explore small-scale deformations in piles of disordered grains, with particular attention to friction; and present theories of various modes of disorder. Along the way, they discuss such concepts as force chains, arching effects, wet grains, sticky contacts, and inertial effects. Drawing on recent numerical simulations as well as classical concepts developed in physics and mechanics, the book offers an accessible introduction to a rapidly developing field.
Author:
Publisher:
ISBN:
Category : Bulk solids flow
Languages : en
Pages : 528
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 320
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Book Description
Author: Massao Satake
Publisher: Elsevier
ISBN: 1483290158
Category : Technology & Engineering
Languages : en
Pages : 383
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Book Description
This proceedings volume contains papers from researchers in Japan, the United States and England who have made fundamental contributions to the micromechanics of granular materials. The purpose of the seminar was to facilitate an exchange of ideas between scientists working with statistical and continuum theories, computer simulations and experiments on both static and dynamic behaviour. In describing the solid like behaviour of granular materials, many new ideas on the constitutive relations are introduced in this volume. As an application of the analysis, the mechanism of liquefaction is discussed. Computer simulations have become a vital tool in establishing the micromechanical approaches which otherwise would not be experimentally tested. In numerical simulations and theoretical analyses of rapid granular flow, various modifications on the nature of materials and boundaries are given. Possible applications of the techniques of the stereology and analysis based on geometrical statistics are also included. The papers collected in this volume signify that the promotion of a good understanding of the mechanics of granular materials has been and will continue to be valued in a variety of technical disciplines.
Author: H.H. Shen
Publisher: Elsevier
ISBN: 1483291286
Category : Technology & Engineering
Languages : en
Pages : 476
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Book Description
The 45 papers presented in this volume all share the common goal of constructing continuum models based on the micro behaviours of granular materials. Computer simulations continue to provide observations to aid modelling, while new experimental works begin to show promise for increased understanding in this area. Theoretical studies have extended into transitions between the rapid and quasi-static regimes and the fluid and solid mixture flows. Exciting new topics discussed in this volume include: concepts of a measure for randomness in quasi-static granular materials, which is analogous to the granular temperature in a rapid flow; scaling effects in granular media and their implications in both physical and computer simulations; instability; and boundary effects on heterogeneous behavior in simple flow configurations, which are posing new challenges for mathematical modelling. The volume will prove indispensable reading for researchers interested in the current developments in the fundamental aspects of mechanics of granular materials.
Author: Constantine M. Dafermos
Publisher: Springer Science & Business Media
ISBN: 3642616348
Category : Science
Languages : en
Pages : 758
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Book Description
This volume collects papers dedicated to Jerry Ericksen on his sixtieth birthday, December 20, 1984. They first appeared in Volumes 82-90 (1983-1985) of the Archive for Rational Mechanics and Analysis. At the request of the Editors the list of authors to be invited was drawn up by C. M. Dafermos, D. D. Joseph, and F. M. Leslie. The breadth and depth of the works here reprinted reflect the corresponding qualities in Jerry Ericksen's research, teaching, scholarship, and inspiration. His interests and expertness center upon the mechanics of materials and extend to everything that may contribute to it: pure analysis, algebra, geometry, through all aspects of theoretical mechanics to fundamental experiment, all of these illumi nated by an intimate and deep familiarity with the sources, even very old ones. He is independent of school and contemptuous of party spirit; his generosity in giving away his ideas is renowned, but not everyone is capable of accepting what is offered. His writings are totally free of broad claims and attributions beyond his own study. Some are decisive, some are prophetic, and all are forthright. His work has served as a beacon of insight and simple honesty in an age of ever more trivial and corrupt science. The authors of the memoirs in this volume are his students, colleagues, admirers, and (above all) his friends.
Author: James T. Jenkins
Publisher: Elsevier
ISBN: 1483289818
Category : Technology & Engineering
Languages : en
Pages : 377
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Book Description
Studies in Applied Mechanics, Volume 7: Mechanics of Granular Materials: New Models and Constitutive Relations provides information pertinent to the fundamental aspects of the mechanics of granular materials. This book presents the theoretical and experimental studies of quasi-static deformations of granular materials. Organized into 30 chapters, this volume begins with an overview of the results on the description of a macroscopic stress measure and measures of the fabric of granular masses that support external loads through frictional contact. This text then introduces some quantities for the macroscopic description of mechanical and graphical characteristics of granular materials. Other chapters consider particle rolling, which appears to be a major microscopic deformation mechanism when interparticle friction is large. This book discusses as well the stress-induced anisotropy of granular materials that have initially strong anisotropic fabric. The final chapter deals with the interpretation of linear instabilities of voidage disturbances in fluidized beds. This book is a valuable resource for scientists, theoreticians, and experimentalists.
Author: Mark Wayne Richman
Publisher:
ISBN:
Category : Granular materials
Languages : en
Pages : 504
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Book Description
Author: K. Iwashita
Publisher: CRC Press
ISBN: 1000150518
Category : Study Aids
Languages : en
Pages : 408
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Book Description
This textbook compiles reports written by about 35 internationally recognized authorities, and covers a range of interests for geotechnical engineers. Topics include: fundamentals for mechanics of granular materials; continuum theory of granular materials; and discrete element approaches.
