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Title: Shear dispersion in dense granular flows

We formulate and solve a model problem of dispersion of dense granular materials in rapid shear flow down an incline. The effective dispersivity of the depth-averaged concentration of the dispersing powder is shown to vary as the Péclet number squared, as in classical Taylor–Aris dispersion of molecular solutes. An extension to generic shear profiles is presented, and possible applications to industrial and geological granular flows are noted.
Authors:
 [1] ;  [2]
  1. Princeton Univ., NJ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Princeton Univ., NJ (United States)
Publication Date:
OSTI Identifier:
1214824
Report Number(s):
LA-UR--14-20273
Journal ID: ISSN 1434-5021; PII: 498
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Granular Matter
Additional Journal Information:
Journal Volume: 16; Journal Issue: 4; Journal ID: ISSN 1434-5021
Publisher:
Springer
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 97 MATHEMATICS AND COMPUTING Taylor–Aris dispersion; Rapid granular flow; Bagnold profile; Granular diffusion