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张崇伟
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副教授   博士生导师   硕士生导师

性别: 男

毕业院校: 英国伦敦大学学院

学位: 博士

所在单位: 水利工程系

办公地点: 海岸和近海工程国家重点实验室

联系方式: 84708520转8403

电子邮箱: chongweizhang@dlut.edu.cn

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A coupled Particle-In-Cell (PIC)-Discrete Element Method (DEM) solver for fluid-solid mixture flow simulations

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论文类型: 期刊论文

第一作者: Chen, Qiang

通讯作者: 张崇伟,Zang, Jun,Ning, Dezhi

发表时间: 2021-03-11

发表刊物: JOURNAL OF FLUIDS AND STRUCTURES

卷号: 91

页面范围: 102772-

ISSN号: 0889-9746

关键字: Particle-In-Cell (PIC) method; Discrete Element Method (DEM); Fluid-solid mixture flows; Fall-pipe solid dumping

摘要: In this paper, a coupled Particle-In-Cell (PIC)-Discrete Element Method (DEM) model is developed for numerical simulations of complex fluid-solid mixture flows. The fluidsolid interaction part is solved using the hybrid Eulerian-Lagrangian PIC model, and the solid-solid interaction part is simulated using the Lagrangian DEM model. The PIC model gives the coupled PIC-DEM model both Eulerian efficiency and Lagrangian flexibility, compared to purely Lagrangian methods such as Smoothed Particle Hydrodynamics (SPH). The time step difference between the PIC model and the DEM model is handled using the idea of subcycles. In addition, a straightforward method is proposed for mitigating the issue of unphysical gaps between solids during collision due to the use of the Cartesian cut cell method for fluid-solid interaction. The PIC-DEM model is validated by physical experiments of the collapse of solid cylinder layers with and without water. Following that, the capability of the numerical model is further demonstrated through a more complex problem of solid dumping through fall pipes. The results show great potential of the PIC-DEM model being a useful tool for simulating complex fluid-solid mixture flows. (C) 2019 Elsevier Ltd. All rights reserved.

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