Fluid Driven Separation and Pattern Formation in Granular Media
Author: Diego Paul Sánchez Lana
Publisher:
Published: 2004
Total Pages: 362
ISBN-13:
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Author: Diego Paul Sánchez Lana
Publisher:
Published: 2004
Total Pages: 362
ISBN-13:
DOWNLOAD EBOOKAuthor: Igor Aranson
Publisher: OUP Oxford
Published: 2009-03-12
Total Pages: 368
ISBN-13: 0191560006
DOWNLOAD EBOOKThis 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: Gerald H. Ristow
Publisher: Springer Science & Business Media
Published: 2000
Total Pages: 186
ISBN-13: 9783540667018
DOWNLOAD EBOOKGranular materials are an integral part of our everyday life. They are also the base material for most industrial processing techniques. The highly dissipative nature of the particle collisions means energy input is needed in order to mobilize the grains. This interplay of dissipation and excitation leads to a wide variety of pattern formation processes, which are addressed in this book. The reader is introduced to this wide field by, first, a description of the material properties of granular materials under different experimental conditions that are important in connection with the pattern formation dynamics and, second, by further details given later on in the description of the specific system.
Author: Nhat-Hang P. Duong
Publisher:
Published: 2004
Total Pages: 180
ISBN-13:
DOWNLOAD EBOOKAuthor: Fengshou Zhang
Publisher:
Published: 2012
Total Pages:
ISBN-13:
DOWNLOAD EBOOKIntegrated theoretical and experimental analysis is carried out in this work to investigate the fundamental failure mechanisms and flow patterns involved in the process of fluid injection into dense granular media. The experimental work is conducted with aqueous glycerin solutions, utilizing a novel setup based on a Hele-Shaw cell filled with dense dry sand. The two dimensional nature of the setup allows direct visualization and imaging analysis of the real-time fluid and grain kinematics. The experimental results reveal that the fluid flow patterns show a transition from simple radial flow to a ramified morphology while the granular media behaviors change from that of rigid porous media to localized failure that lead to development of fluid channels. Based on the failure/flow patterns, four distinct failure/flow regimes can be identified, namely, (i) a simple radial flow regime, (ii) an infiltration-dominated regime, (iii) a grain displacement-dominated regime, and (iv) a viscous fingering-dominated regime. These distinct failure/flow regimes emerge as a result of competition among various energy dissipation mechanisms, namely, viscous dissipation through infiltration, dissipation due to grain displacements, and viscous dissipation through flow in thin channels and can be classified based on the characteristic times associated with fluid injection, hydromechanical coupling and viscoelastoplasticity. The injection process is also analyzed numerically using the discrete element method (DEM) coupled with two fluid flow scheme, a fixed coarse grid scheme based on computational fluid dynamics (CFD) and a pore network modeling scheme. The numerical results from the two complementary methods reproduce phenomena consistent with the experimental observations and justify the concept of associating the displacement regimes with the partition among energy dissipation mechanisms. The research in this work, though fundamental in nature, will have direct impacts on many engineering problems in civil, environmental and petroleum engineering such as ground improvement, environmental remediation and reservoir stimulation.
Author: Hide Sakaguchi
Publisher:
Published: 1995
Total Pages: 99
ISBN-13:
DOWNLOAD EBOOKAuthor: Bruno Andreotti
Publisher: Cambridge University Press
Published: 2013-06-13
Total Pages: 471
ISBN-13: 1107034795
DOWNLOAD EBOOKProvides the state-of-the-art of the physics of granular media for graduate students and researchers in physics, applied mathematics and engineering.
Author: G. William Baxter
Publisher:
Published: 1990
Total Pages: 280
ISBN-13:
DOWNLOAD EBOOKAuthor: R. Garcia-Rojo
Publisher: CRC Press
Published: 2005-07-01
Total Pages: 1510
ISBN-13: 1000006735
DOWNLOAD EBOOKThis volume contains the proceedings of the Fifth International Conference on the Micromechanics of Granular Media, Powders and Grains 2005. Powders and Grains is an international scientific conference held every 4 years that brings together engineers and physicists interested in the micromechanics of granular media.The book is a guide to the hotte
Author: Igor S. Aranson
Publisher:
Published: 2009
Total Pages: 343
ISBN-13: 9780191714665
DOWNLOAD EBOOKThis title presents a review of experiments and novel theoretical concepts needed to understand the mechanisms of pattern formation in granular materials. An effort is made to connect concepts and ideas developed in granular physics with new emergent fields, especially in biology, such as cytoskeleton dynamics.