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首页> 外文期刊>Journal of Computational Physics >A disturbance corrected point-particle approach for two-way coupled particle-laden flows on arbitrary shaped grids
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A disturbance corrected point-particle approach for two-way coupled particle-laden flows on arbitrary shaped grids

机译：任意形状网格上双向耦合粒子流动的扰动校正点粒子方法

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摘要

A general, two-way coupled, point-particle formulation that accounts for the disturbance created by the dispersed particles in obtaining the undisturbed fluid flow field needed for accurate computation of the force closure models is presented. Specifically, equations for the disturbance field created by the presence of particles are first derived based on the inter-phase momentum coupling force in a finite-volume formulation. Solution to the disturbance field is obtained using two approaches: (i) direct computation of the disturbance velocity and pressure using the reaction force due to particles at computational control volumes, and (ii) a linearized, approximate computation of the disturbance velocity field, specifically applicable for low Reynolds number flows. In both approaches, the computed disturbance field is used to obtain the undisturbed fluid velocity necessary to model the aerodynamic forces on the particle. The two approaches are thoroughly evaluated for a single particle in an unbounded and wall-bounded flow on uniform, anisotropic, as well as unstructured grids to show accurate computation of the particle motion and inter-phase coupling. The approach is straightforward and can be applied to any Euler-Lagrange formulations of particle-laden flows. (C) 2021 Elsevier Inc. All rights reserved.
机译：提出了一种通用的、双向耦合的点粒子公式，该公式解释了在获得精确计算力闭合模型所需的无扰动流场时，分散粒子产生的扰动。具体地说，基于有限体积公式中的相间动量耦合力，首先导出了由粒子存在产生的扰动场的方程。通过两种方法获得扰动场的解：（i）在计算控制体积下，使用颗粒产生的反作用力直接计算扰动速度和压力；（ii）扰动速度场的线性化近似计算，特别适用于低雷诺数流动。在这两种方法中，计算出的扰动场用于获得模拟颗粒上气动力所需的未扰动流体速度。这两种方法在均匀、各向异性和非结构网格上对无界和壁面有界流动中的单个粒子进行了全面评估，以显示粒子运动和相间耦合的精确计算。该方法简单易行，可应用于颗粒流的任何欧拉-拉格朗日公式。（c）2021爱思唯尔公司保留所有权利。

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