Record Details

Mixing and segregation of granular materials

DSpace at IIT Bombay

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Field Value
 
Title Mixing and segregation of granular materials
 
Creator OTTINO, JM
KHAKHAR, DV
 
Subject chaos
complex systems
granular flow
granular materials
mixing
2-dimensional rotating-drum
free-surface segregation
radial segregation
thermal-diffusion
axial segregation
inclined chute
multicomponent mixtures
numerical-simulation
chaotic advection
size segregation
 
Description Granular materials segregate. Small differences in either size or density lead to flow-induced segregation, a complex phenomenon without parallel in fluids. Modeling of mixing and segregation processes requires the confluence of several tools, including continuum and discrete descriptions (particle dynamics, Monte Carlo simulations, cellular automata computations) and, often, considerable geometrical insight. None of these viewpoints, however, is wholly satisfactory by itself. Moreover, continuum and discrete descriptions of granular flows are regime dependent, and this fact may require adopting different subviewpoints. This review organizes a body of knowledge that forms--albeit imperfectly--the beginnings of an expandable continuum framework for the description of mixing and segregation of granular materials. We focus primarily on noncohesive particles, possibly differing in size, density, shape, etc. We present segregation mechanisms and models for size and density segregation and introduce chaotic advection, which appears in noncircular tumblers. Chaotic advection interacts in nontrivial ways with segregation in granular materials and leads to unique equilibrium structures that serve as a prototype for systems displaying organization in the midst of disorder.
 
Publisher ANNUAL REVIEWS INC
 
Date 2011-10-12T12:46:45Z
2011-12-15T09:16:07Z
2011-10-12T12:46:45Z
2011-12-15T09:16:07Z
2000
 
Type Review
 
Identifier ANNUAL REVIEW OF FLUID MECHANICS,32,55-91
0066-4189
http://dx.doi.org/10.1146/annurev.fluid.32.1.55
http://dspace.library.iitb.ac.in/xmlui/handle/10054/13774
http://hdl.handle.net/100/3010
 
Language en