On the Conduction Mechanism in Granular Materials PDF Download
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Author: I. P. Zvyagin
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Book Description
We discuss the effect of virtual intermediate localized states on inter-grain tunneling that controls conduction in granular conductors on the insulating side of the metal-insulator transition. It is shown that intermediate states can substantially increase inter-grain tunneling transition probabilities and give rise to the conductivity temperature dependence of the form ln(sigma) ^ -(T(0)/T), where x approximately equal 0.4, and to a large enhancement of the conductivity.
Author: I. P. Zvyagin
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Book Description
We discuss the effect of virtual intermediate localized states on inter-grain tunneling that controls conduction in granular conductors on the insulating side of the metal-insulator transition. It is shown that intermediate states can substantially increase inter-grain tunneling transition probabilities and give rise to the conductivity temperature dependence of the form ln(sigma) ^ -(T(0)/T), where x approximately equal 0.4, and to a large enhancement of the conductivity.
Author: C. M. Ablow
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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Book Description
The role of the gas compression-conduction mechanism in shock initiation of granular materials was studied by analyzing the dependence of grain surface temperature on the magnitude of the shock and the relative sizes of grain and surrounding volume of interstitial gas. It is shown that at one atmosphere initial ambient pressure the mechanism can be a contributing factor to initiation if particle size distribution or particle irregularity leads to the existence of small particles surrounded by large, gas-filled spaces; the required sizes are possible for real materials. At low pressures (approximately 10 microns Hg) on the other hand, it is unlikely that the mechanism is a contributing factor. Since in practice these granular masses can be shock-initiated independent of initial ambient pressure, the conclusion is that at least one primary initiation mechanism other than gas compression-conduction plays a role.
Author: Anita Mehta
Publisher: Cambridge University Press
ISBN: 9780521660785
Category : Science
Languages : en
Pages : 336
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Book Description
2007 account of developments in granular physics for researchers in statistical and mathematical physics.
Author: Jacques Duran
Publisher: Springer Science & Business Media
ISBN: 1461204992
Category : Science
Languages : en
Pages : 227
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Book Description
This introductory text develops the fundamental physics of the behavior of granular materials. It covers the basic properties of flow, friction, and fluidization of uniform granular materials; discusses mixing and segregation of heterogeneous materials (the famous "brazil-nut problem"); and concludes with an introduction to numerical models. The presentation begins with simple experiments and uses their results to build concepts and theorems about materials whose behavior is often quite counter-intuitive; presenting in a unified way the background needed to understand current work in the field. Developed for students at the University of Paris, the text will be suitable for advanced undergraduates and beginning graduates; while also being of interest to researchers and engineers just entering the field.
Author: Igor Aranson
Publisher: OUP Oxford
ISBN: 0191560006
Category : Science
Languages : en
Pages : 368
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Book Description
This book is a systematic introduction to a new and exciting field of patterns in granular matter. Granular materials are collections of discrete macroscopic solid grains with a typical size large enough that thermal fluctuations are negligible. Despite this seeming simplicity, properties of granular materials are different from conventional solids, liquids and gases due to the dissipative and highly nonlinear nature of forces among grains. The last decade has seen an explosion of interest to nonequilibrium phenomena in granular matter among physicists, both on the experimental and theoretical side. Among these phenomena, one of the most interesting is the ability of granular matter upon mechanical excitation to form highly ordered patterns such as ripples, avalanches, or bands of segregated materials. This book presents a comprehensive review of experiments and novel theoretical concepts needed to understand the mechanisms of pattern formation in granular materials. This book is written for experienced physicists interested in this new rapidly developing field, as well as young researchers and graduate students entering this field. We hope that both experimentalists and theorists already working in the field will find it useful.
Author: Haye Hinrichsen
Publisher: John Wiley & Sons
ISBN: 3527604480
Category : Science
Languages : en
Pages : 364
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Book Description
Despite extensive empirical experience, there is both a scientific challenge and a technological need to develop an understanding of the mechanisms underlying the flow of grains. This new reference provides quick access to the current level of knowledge, containing review articles covering recent developments in the field of granular media from the viewpoints of applied, experimental, and theoretical physics. In short, a must-have for advanced researchers and specialists as well as a useful starting point for anyone entering this field. The authors represent different directions of research in the field, with their contributions covering: - Static properties - Granular gases - Dense granular flow - Hydrodynamic interactions - Charged and magnetic granular matter - Computational aspects
Author: Abdurrahim Essayah
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Qicheng Sun
Publisher: WIT Press
ISBN: 1845646444
Category : Technology & Engineering
Languages : en
Pages : 209
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Book Description
Focussing on the basic mechanics and underlying physics of granular material, Mechanics of Granular Matter starts with an introduction to contact mechanics of individual particles before moving on to a discussion of the structure of force chain networks and the influence on bulk mechanical properties of granular solids and granular flows. Furthermore, a preliminary multi scale framework is proposed for the nonlinear mechanics and strain localization in granular materials.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 292
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Book Description
Author: William D. Van Vorst
Publisher:
ISBN:
Category : Granular materials
Languages : en
Pages : 276
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Book Description
