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.
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页数：25
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