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发布时间：2019-03-12

论文类型：期刊论文

发表时间：2017-06-15

发表刊物：POWDER TECHNOLOGY

收录刊物：Scopus、EI、SCIE

卷号：315

页面范围：486-498

ISSN号：0032-5910

关键字：Point-particle; Particle collisions; Lattice Boltzmann Method; Immersed Boundary Method; Hard Sphere Molecular Dynamics

摘要：Particle collisions play a critical role in determining the fluid-particle interaction. ThuS, particulate matters and their interaction within a flow need an accurate treatment through felicitous composite methods. Accordingly, we present a numerical simulation based on a combined Lattice Boltzmann Method (LBM), Immersed Boundary Method (IBM), and Hard Sphere Molecular Dynamics (HSMD) scheme, with applications. This simulation method aims to understand spherical point-particle sedimentation in an incompressible Newtonian fluid. A Stokes' drag model implements the hydrodynamic interaction using Ladd's LBM scheme and a momentum exchange based IBM. The HSMD evaluates the discrete particles' kinematics and trajectory. We simulate a 3D single particle settling case as a benchmark. The simulation result exhibits a close match between the terminal particle velocity and an analytical result; it reproduces the expected exponential behavior. Finally, a sedimentation case involving 7200 particles demonstrates the composite schemes' capability to solve the complex interactions. This article discusses the interesting observations and results. (C) 2017 Elsevier B.V. All rights reserved.