Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction

doi:10.1088/1674-1056/ade070

中国物理B ›› 2025, Vol. 34 ›› Issue (10): 104501-104501.doi: 10.1088/1674-1056/ade070

Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction

Anghao Li(李昂昊), Zaizheng Wang(王在政), Haoyu Shi(史浩瑜), Min Sun(孙敏), and Decai Huang(黄德财)†

Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China

收稿日期:2025-04-12 修回日期:2025-05-03 接受日期:2025-06-04 发布日期:2025-10-09
通讯作者: Decai Huang E-mail:hdc@njust.edu.cn
基金资助:
This work is financially supported by the National Natural Science Foundation of China (Grant No. 11574153) and the Fund of No. TSXK2022D007.

Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction

Anghao Li(李昂昊), Zaizheng Wang(王在政), Haoyu Shi(史浩瑜), Min Sun(孙敏), and Decai Huang(黄德财)†

Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China

Received:2025-04-12 Revised:2025-05-03 Accepted:2025-06-04 Published:2025-10-09
Contact: Decai Huang E-mail:hdc@njust.edu.cn
Supported by:
This work is financially supported by the National Natural Science Foundation of China (Grant No. 11574153) and the Fund of No. TSXK2022D007.

1. 2025-104501-SI.zip(12061KB)

摘要/Abstract

摘要： This paper investigates the influence of filling fraction on the segregation patterns of binary granular mixtures in a vertically vibrating drum through experiments and simulations. Glass and stainless steel spherical grains, which differ in mass density, are used to give rise to density-driven segregation. The results reveal four segregation patterns, including Brazil nut effect segregation, counterclockwise two-eye-like segregation, dumpling-like segregation and clockwise two-eye-like segregation. The theoretical analysis demonstrates that grains predominantly exhibit counterclockwise convection at low filling fractions, while clockwise convection dominates at high filling fractions. Competition between buoyancy and convection forces determines the final stable segregation pattern. These findings provide valuable insights into controlling segregation in granular systems, which is crucial for optimizing industrial processes in fields such as pharmaceuticals and chemical engineering.

关键词: granular matter, granular flow, segregation mechanism, discrete element method (DEM)

Abstract: This paper investigates the influence of filling fraction on the segregation patterns of binary granular mixtures in a vertically vibrating drum through experiments and simulations. Glass and stainless steel spherical grains, which differ in mass density, are used to give rise to density-driven segregation. The results reveal four segregation patterns, including Brazil nut effect segregation, counterclockwise two-eye-like segregation, dumpling-like segregation and clockwise two-eye-like segregation. The theoretical analysis demonstrates that grains predominantly exhibit counterclockwise convection at low filling fractions, while clockwise convection dominates at high filling fractions. Competition between buoyancy and convection forces determines the final stable segregation pattern. These findings provide valuable insights into controlling segregation in granular systems, which is crucial for optimizing industrial processes in fields such as pharmaceuticals and chemical engineering.

Key words: granular matter, granular flow, segregation mechanism, discrete element method (DEM)

中图分类号: (Granular systems)

45.70.-n

47.57.Gc (Granular flow) 45.70.Mg (Granular flow: mixing, segregation and stratification) 75.40.Mg (Numerical simulation studies)

Anghao Li(李昂昊), Zaizheng Wang(王在政), Haoyu Shi(史浩瑜), Min Sun(孙敏), and Decai Huang(黄德财). Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction[J]. 中国物理B, 2025, 34(10): 104501-104501.

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Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction

Density-driven segregation of binary granular mixtures in a vertically vibrating drum: The role of filling fraction

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