Abstract
This paper considers segregation in collisional granular shearing flows from the experimental, computational, and theoretical standpoints. We focus on a phenomenon of segregation where the separation of grains by size or mass is driven by spatial gradients in the fluctuation energy of the grains.
We report experiments carried out in microgravity with a shear cell shaped as a race track and containing a mixture of two types of spherical grains. In those experiments, a gradient of fluctuation energy was produced between an inner moving boundary driving collisions among the grains and an outer, more dissipative boundary at the periphery of the cell. The grain segregation and the velocity statistics were captured by a rapid video camera and analyzed using computer-vision software.
We briefly outline a kinetic theory and simulations for these flows. We compare the corresponding profiles of granular concentration, mean velocity, and fluctuation energy with the experimental results.
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Louge, M.Y., Jenkins, J.T., Xu, H., Arnarson, B.Ö. (2001). Granular Segregation in Collisional Shearing Flows. In: Aref, H., Phillips, J.W. (eds) Mechanics for a New Mellennium. Springer, Dordrecht. https://doi.org/10.1007/0-306-46956-1_16
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DOI: https://doi.org/10.1007/0-306-46956-1_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-7156-4
Online ISBN: 978-0-306-46956-5
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