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A comprehensive parametric study of LBM-DEM for immersed granular flows

机译:LBM-DEM用于沉浸颗粒流的综合参数研究

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This paper presents a parametric study of a fluid-particle model which couples Lattice Boltzmann Method (LBM) and Discrete Element Method (DEM) using an immersed moving boundary technique. Benchmark cases with increasing complexity are simulated to understand the numerical accuracy, stability and efficiency of the algorithm. A guideline for a high-quality LBM-DEM model is proposed and applied to a test case of granular collapse in water. The simulation result shows excellent agreement with a companion experiment, which demonstrates the capability of LBM-DEM to describe the dynamics of densely packed and friction dominant immersed granular flows, highlighting its potential to study geophysical mass movements.
机译:本文提出了一种流体粒子模型的参数研究,该模型使用浸入式移动边界技术将莱迪思·玻尔兹曼方法(LBM)和离散元素方法(DEM)结合在一起。模拟复杂度不断增加的基准案例,以了解算法的数值准确性,稳定性和效率。提出了高质量LBM-DEM模型的指南,并将其应用于水中颗粒崩塌的测试案例。模拟结果与伴随实验非常吻合,该实验证明了LBM-DEM能够描述密集堆积和摩擦为主的沉浸颗粒流的动力学,从而突出了其研究地球物理质量运动的潜力。

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