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Transverse flow and mixing of granular materials in a rotating cylinder

DSpace at IIT Bombay

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Title Transverse flow and mixing of granular materials in a rotating cylinder
 
Creator KHAKHAR, DV
MCCARTHY, JJ
SHINBROT, T
OTTINO, JM
 
Subject motion
solids
shear
 
Description The focus of this work is analysis of mixing in a rotating cylinder-a prototype system for mixing of granular materials-with the objective of understanding and highlighting the role of flow on the dynamics of the process. The analysis is restricted to low speeds of rotation, when the free surface of the granular solids is nearly flat, and when particles are identical so that segregation is unimportant. The flow is divided into two regions: a rapid flow region of the cascading layer at the free surface, and a fixed bed of particles rotating at the angular speed of the cylinder. A continuum model, in which averages are taken across the layer, is used to analyze the flow in the layer. Good agreement is obtained between the predictions of the flow model for the layer thickness profile and experimental results obtained by digital image analysis. The dynamics of the mixing process are studied by advecting tracer particles by the flow and allowing for particle diffusion in the cascading layer. The mixing model predictions for distribution of tracer particles and mixing rates are compared qualitatively and quantitatively to experimental data. Optimal operating conditions, at which mixing rates are maximum, are determined. (C) 1997
 
Publisher AMER INST PHYSICS
 
Date 2011-07-16T18:16:36Z
2011-12-26T12:49:53Z
2011-12-27T05:35:42Z
2011-07-16T18:16:36Z
2011-12-26T12:49:53Z
2011-12-27T05:35:42Z
1997
 
Type Article
 
Identifier PHYSICS OF FLUIDS, 9(1), 31-43
1070-6631
http://dx.doi.org/10.1063/1.869172
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4491
http://hdl.handle.net/10054/4491
 
Language en