Shear dispersion in dense granular flows
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- Christov, I.C. & Stone, H.A. Granular Matter (2014) 16: 509. doi:10.1007/s10035-014-0498-0
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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.