University of Illinois Urbana-Champaign

Structure and kinematics in dense free-surface granular flow

Hill, Kimberly M.; Gioia, Gustavo; Tota, Vinay V.

Permalink

https://hdl.handle.net/2142/982

Description

Title
Structure and kinematics in dense free-surface granular flow
Author(s)
  • Hill, Kimberly M.
  • Gioia, Gustavo
  • Tota, Vinay V.
Issue Date
2003
Keyword(s)
  • Boundary layers
  • Granular flow
Abstract
We show that the structure of a dense, free-surface boundary layer granular flow is similar to the structure of a laminar liquid flow: There is a strong component of order (stratification parallel to the mean flow) superposed with a mild component of disorder (self-diffusion perpendicular to the mean flow).We also show that the self-diffusion coefficient scales with the mean velocity and propose a model that relates this scaling to the ordered structure of the flow. Last, we show that the structure of the flow imprints an oscillatory signature (similar to that found in confined granular flow) on the mean velocity profile.
Publisher
American Physical Society
Type of Resource
text
Language
en
Permalink
http://hdl.handle.net/2142/982
DOI
https://doi.org/10.1103/PhysRevLett.91.064302
Has Version(s)
Previously released as TAM Report 1033. http://hdl.handle.net/2142/300.
Copyright and License Information
Copyright owned by American Physical Society 2003.

Owning Collections

Published Papers - Theoretical and Applied Mechanics (TAM) PRIMARY
Papers published by faculty in Theoretical and Applied Mechanics