General model for segregation forces in flowing granular mixtures

被引：0

作者：

Duan, Yifei ^{[1
]}

Jing, Lu ^{[2
,3
]}

Umbanhowar, Paul B. ^{[4
]}

Ottino, Julio M. ^{[1
,4
,5
]}

Lueptow, Richard M. ^{[1
,4
,5
]}

机构：

[1] Northwestern Univ, Dept Chem & Biol Engn, Evanston, IL 60208 USA

[2] Tsinghua Univ, Inst Ocean Engn, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

[3] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

[4] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[5] Northwestern Univ, Northwestern Inst Complex Syst N, Evanston, IL 60208 USA

来源：

JOURNAL OF FLUID MECHANICS | 2024年 / 989卷

关键词：

dry granular material; granular mixing; PARTICLE-SIZE SEGREGATION; DENSE;

D O I：

10.1017/jfm.2024.483

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Particle segregation in dense flowing size-disperse granular mixtures is driven by gravity and shear, but predicting the associated segregation force due to both effects has remained an unresolved challenge. Here, a model of the combined gravity- and kinematics-induced segregation force on a single intruder particle is integrated with a model of the concentration dependence of the gravity-induced segregation force. The result is a general model of the net particle segregation force in flowing size-bidisperse granular mixtures. Using discrete element method simulations for comparison, the model correctly predicts the segregation force for a variety of mixture concentrations and flow conditions in both idealized and natural shear flows.

引用

页数：25

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