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Title:Structure and kinematics in dense free-surface granular flow
Author(s):Hill, Kimberly M.; Gioia, Gustavo; Tota, Vinay V.
Subject(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.
Issue Date:2003
Publisher:American Physical Society
Citation Info:Kimberly M. Hill, Gustavo Gioia, and Vinay V. Tota. Structure and kinematics in dense free-surface granular flow. Physical Review Letters, Vol. 91, No. 6, 2003, pp. 064302/1-064302/4.
Publication Status:published or submitted for publication
Peer Reviewed:is peer reviewed
Rights Information:Copyright owned by American Physical Society 2003.
Date Available in IDEALS:2007-06-19
Has Version(s):Previously released as TAM Report 1033.

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