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Dense inclined flows of inelastic spheres: tests of an extension of kinetic theory

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Abstract

Using the results of recent numerical simulations, we extend an existing kinetic theory for dense flows of identical, nearly elastic, frictionless spheres to identical, very dissipative, frictional spheres. The existing theory incorporates an additional length scale in the expression for the collisional rate of dissipation; this length scale is identified with the size of a cluster of correlated particles. Parameters of the theory for very dissipative, frictional spheres are set using the results of physical experiments on inclined flows of spheres over a rigid, bumpy base in the absence of sidewalls. The resulting theory is then tested against the results of physical experiments on flows of the same material over the surface of an erodible heap when frictional sidewalls are present.

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Authors and Affiliations

  1. Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, NY, 14853, USA

    James T. Jenkins

  2. Department of Environmental, Hydraulic, Infrastructure, and Surveying Engineering, Politecnico di Milano, 20133, Milan, Italy

    Diego Berzi

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  1. James T. Jenkins
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  2. Diego Berzi
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Correspondence to James T. Jenkins.

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Jenkins, J.T., Berzi, D. Dense inclined flows of inelastic spheres: tests of an extension of kinetic theory. Granular Matter 12, 151–158 (2010). https://doi.org/10.1007/s10035-010-0169-8

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  • DOI: https://doi.org/10.1007/s10035-010-0169-8

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