Investigation of vertical size segregation in bedload sediment transport with a coupled fluid-discrete element model
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چکیده
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Bedload transport by a vertical jet impinging upon sediments
Bedload transport by a vertical jet impinging upon sediments Bruce R. Sutherland1,a) and Stuart Dalziel2 1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada and Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada 2Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3, Unit...
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At the smallest scales of sediment transport in rivers, the coherent structures of the turbulent boundary layer constitute the fundamental mechanisms of bedload transport, locally increasing the instantaneous hydrodynamic forces acting on sediment particles, and mobilizing them downstream. Near the critical threshold for initiating sediment motion, the interactions of the particles with these u...
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The vertical sorting of grains that occurs during the process of sheet flow largely has been ignored in parameterized models for sediment transport. Here we performed computer simulations of sheet flow transport with bimodal distributions of coarse grains under forcing from idealized nearshore waves. The results demonstrate that the mobile bed rapidly experiences vertically segregation of grain...
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چکیده ندارد.
15 صفحه اولMultiphase Debris Flow Simulations with the Discrete Element Method Coupled with a Lattice-boltzmann Fluid
Debris flows are dangerous natural hazards that occur mainly in mountainous terrains after heavy rainfall, responsible for casualties and damages reported yearly worldwide. Their heterogeneous composition, with a viscoplastic fluid and the presence of a relevant granular solid phase, leads to a non-trivial behaviour making them a challenging problem both for the physical description of the phen...
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ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2017
ISSN: 2100-014X
DOI: 10.1051/epjconf/201714009025