Iutam Symposium on Segregation in Granular Flows

by Iutam Symposium on Segregation in Granular Flows; Blackmore, Denis L.

• ISBN13: 9780792365471
• ISBN10: 079236547X
• Format: Hardcover
• Copyright: 2000-10-01
• Publisher: Kluwer Academic Pub

Summary

Segregation is a pervasive phenomenon whereby a flowing granular mass consisting of particles with diverse physical properties becomes spatially inhomogeneous. In the industrial sector that deals with the handling and processing of bulk solids, this non-uniformity is highly undesirable since blend homogeneity is generally a stringent requirement of most products. In the arena of geophysical flows, segregation can enhance the destructive capabilities of natural events such as avalanches and landslides. During the last 15 years, these issues have provided motivation and fostered collaborations between the communities of mathematicians, engineers, industrial researchers, and physicists to develop predictive models of segregation by integrating the perspectives and approaches of each. The collection of unique papers brings to light many of the perplexing scientific and technical issues in our current understanding of this complex phenomenon. It addresses advances in experiment, computational modeling and theory. This volume is one of the very few books devoted entirely to problems of segregation of particulate solids.

Table of Contents

Preface	ix
Acknowledgements	xi
EXPERIMENTS
Chairs: A. Caprihan, E. Fukushima, and M. Nakagawa
Segregation Mechanisms in Condensed Granular Flows: A Summary of Some Fundamental Experiments	1	(10)
J. Bridgwater
Segregation Mechanisms and Their Quantification using Segregation Testers	11	(20)
S. de Silva
A. Dyroy
G. G. Enstad
Particle Segregation in Granular Flows Down Chutes	31	(22)
J. W. Vallance
S. B. Savage
Visualization of Segregation inGranular Matter Inside Silos	53	(8)
A. Samadani
A. Pradhan
A. Kudrolli
Segregation During Gravity Filling of Storage Bins	61	(12)
D. B. Hastie
P. W. Wypych
Study on the Mixing of Discs in a Galton's Device	73	(8)
L. Bruno
A. Calvo
I. Ippolito
S. Borles
A. Valance
D. Bideau
Size Segregation in Snow Avalanches: Observations and Experiments	81	(8)
J. McElwaine
K. Nishimura
Analyzing and Overcoming Industrial Blending and Segregation Problems	89	(14)
J. K. Prescott
J. W. Carson
Microgravity Segregation in Collisional Granular Shearing Flows	103	(10)
M. Y. Louge
J. T. Jenkins
A. Reeves
S. Keast
Size-Segregation and Mixing Phenomena in Powders Fluidised by Acoustic Vibrations	113	(8)
A. P. Marland
and L. V. Woodcock
Segregation of Binary Mixtures in a Vertical Shaker	121	(8)
S. S. Hsiau
H. Y. Hu
Mixing and Segregation in Vertically Vibrated Granular Layers	129	(12)
A. Alexeev
V. Royzen
V. Dudko
A. Goldshtein
M. Shapiro
Mixing and Segregation of Grains Studied by N. M. R. Imaging Investigation--Application to a Turbulence Mixer: The Turbula Blender	141	(12)
P. Porion
N. Sommier
P. Evesque
Velocity Fluctuation Measurements of Granular Media in a Rotating Cylinder by Nuclear Magnetic Resonance Imaging	153	(10)
A. Caprihan
J. D. Seymour
S. A. Altobelli
E. Fukushima
Axial Migration of Two Species of Particles in a Horizontal Cylinder	163	(8)
M. Nakagawa
A. Awazu
H. Nishimori
Signatures of Chaos in 2D tumbling Mixers	171	(10)
K. M. Hill
J. F. Gilchrist
D. V. Khakhar
J. M. Ottino
Size Segregation in Cylindrical Couette Flows of Particles: Experiments and Simulations	181	(12)
A. Karion
M. L. Hunt
Coupled Size and Density Effects in 2D-Rotating Cylinder: Two-Dimensional Radial Segregation	193	(10)
J. H. Eggert
D. Wu
The Kinetics of Segregation in Fluidised Beds	203	(8)
M. C. Leaper
A. S. Burbidge
J. P. K. Seville
G. Blair
Using Gas Flows to Probe Segregation in Moving Granular Beds	211	(12)
W. R. Paterson
D. L. Moppett
L. P. B. Coelho
G. E. Southern
J. E. Fitzgerald
D. M. Scott
THEORY
Chairs: D. L. Blackmore and J. T. Jenkins
Particle Segregation in Collisional Shear Flows	223	(8)
B. O. Arnarson
J. T. Jenkins
M. Y. Louge
Origins of Some Size Segregation Phenomena: ``Why the Brazil Nuts Are on Top'' (in a nutshell!)	231	(10)
L. V. Woodcock
The Mechanics of Particle-Fluid Flows at High Solids Volume Fraction	241	(14)
E. B. Pitman
Dynamics of a Two Species Oscillating Particle System	255	(14)
D. L. Blackmore
R. V. Samulyak
R. N. Dave
A. Rosato
Shock Waves and Particle Size Segregation in Shallow Granular Flows	269	(8)
J. M. N. T. Gray
Y. C. Tai
K. Hutter
SIMULATIONS
Chair: P. Singh and C. Wassgren
Mixing in a Mono-Disperse Granular Bed Subject to Vertical Vibrations	277	(10)
C. Wassgren
Impact-Regulated Mixing and Segregation in Poured Granular Heaps	287	(10)
U. Tuzun
L. Smith
J. Baxter
D. M. Heyes
Segregation of Polydisperse Granular Media in Presence of a Temperature Gradient	297	(8)
S. Luding
O. Strauss
S. McNamara
A Simple Method to Mix Granular Materials	305	(6)
S. McNamara
S. Luding
Mixing and Segregation in Rotating Drums: A Numerical Study	311	(10)
G. H. Ristow
DEM Study of Segregation in a Rotating Cylinder	321	(6)
K. Yamane
Air Entrainment and Segregation in Powder Flows	327	(10)
R. Mudryy
P. Singh
A. D. Rosato
Author Index	337	(2)
Participants	339