Structure and Kinematics in Dense Free-Surface Granular Flow

K. M. Hill, G. Gioia, V. V. Tota

Research output: Contribution to journalArticle

49 Scopus citations

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.

Original languageEnglish (US)
JournalPhysical Review Letters
Volume91
Issue number6
DOIs
StatePublished - Aug 8 2003

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