camera iphone 8 plus apk Mechanics of granular column collapse in fluid: Effect of initial packing density

K. Kumar (1), J-Y. Delenne (2), K. Soga ​(3),
(1) Department of Engineering, University of Cambridge, UK
(2) IATE, ​ UMR 1208 INRA-CIRAD-Montpellier Supagro-UM2,France.
(3) Department of Civil and Environmental Engineering, University of California, Berkeley, USA

Two-dimensional sub-grain scale numerical simulations are performed to understand the flow dynamics of granular collapse in fluid. The Discrete Element (DEM) technique is coupled with the Lattice Boltzmann Method (LBM), for fluid-grain interactions, to understand the evolution of submerged granular flows. The fluid phase is simulated using Multiple-Relaxation-Time LBM (LBM-MRT) for numerical stability. In order to simulate interconnected pore space in 2D, a reduction in the radius of the grains (hydrodynamic radius) is assumed during LBM computations. A parametric analysis is performed to assess the influence of the granular characteristics (initial packing) on the evolution of flow and run-out distances for varying slope angles. The granular flow dynamics is investigated by analysing the effect of hydroplaning, water entrainment and viscous drag on the granular mass.

camera iphone 8 plus apk Mechanics of granular column collapse in fluid: Effect of initial packing density
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Science & Technology	Upload TimePublished on 19 Jun 2017

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