Two-fluid smoothed particle hydrodynamics simulation of submerged granular column collapse |
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| Institution: | 1. Research Scholar, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, WB 721302, India;2. Assistant Professor, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, WB 721302, India;1. Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran;2. Water & Climate Impact Research Centre, University of Victoria, Victoria, Canada;1. EDF R&D/LNHE and Saint-Venant Laboratory for Hydraulics, 6 quai Watier, 78400 Chatou, France;2. EDF R&D/MFEE, 6 quai Watier, 78400 Chatou, France |
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| Abstract: | In this paper, a two-fluid smoothed particle hydrodynamics (SPH) model, based on the mixture theory, is employed to investigate the complex interactions between the solid particles and the ambient water during the process of submerged granular column collapse. From the simulation, two regimes of the collapse, one being quick and the other being slow, are identified and the reasons of formation are analyzed. It is found that, a large internal friction angle of the granular phase, representing large drag force between solid particles, helps form the slow regime. Small hydraulic conductivity, representing large inter-phase drag force, also retards the collapse dramatically. Good agreements between our numerical results and other researchers’ numerical and experimental results are observed, which demonstrates the capability of the proposed two-fluid SPH approach in dealing with saturated water–soil mixture flows. |
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| Keywords: | Submerged granular column collapse Water–granular mixture flow SPH method Numerical simulation |
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