Smoothed particle hydrodynamics modelling of particle-size segregation in granular flows

被引：2

作者：

Zhu, Chengwei ^{[1
,2
]}

Peng, Chong ^{[3
]}

Wu, Wei ^{[4
]}

机构：

[1] Zhejiang Univ, Res Ctr Coastal & Urban Geotech Engn, Hangzhou 310058, Peoples R China

[2] Engn Res Ctr Urban Underground Space Dev Zhejiang, Hangzhou 310058, Peoples R China

[3] ESS Engn Software Steyr GmbH, Berggasse 35, A-4400 Steyr, Austria

[4] Univ Bodenkultur, Inst Geotech, Feistmantelstr 4, A-1180 Vienna, Austria

来源：

JOURNAL OF FLUID MECHANICS | 2023年 / 977卷

关键词：

dry granular material; coupled diffusion and flow; computational methods; BOUNDARY-CONDITIONS; SELF-DIFFUSION; SPH; SIMULATIONS; MIXTURES; BEHAVIOR; NEUMANN;

D O I：

10.1017/jfm.2023.995

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this work, smoothed particle hydrodynamics (SPH) is employed to investigate the segregation evolution in granular flows. We first provide the Lagrangian description-based governing equations, including the linear momentum conservation and the segregation-diffusion equation. Then the hybrid continuum surface reaction scheme is introduced to formulate the concentration-related inhomogeneous Neumann boundary condition on the free and wall surfaces. We follow a two-stage strategy to advance boundary particle searching and normal direction identification. Moreover, C-1 consistency is considered based on the Taylor series to obtain accurate segregation flux gradient along the boundary. Our SPH model is validated with a shear box experiment. The model is then applied to investigate the segregation mechanism in bidisperse-sized granular flows in a rotating drum.

引用

页数：43

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