| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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 |
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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.
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Received: 12 April 2025
Revised: 03 May 2025
Accepted manuscript online: 04 June 2025
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PACS:
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45.70.-n
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(Granular systems)
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47.57.Gc
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(Granular flow)
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45.70.Mg
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(Granular flow: mixing, segregation and stratification)
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75.40.Mg
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(Numerical simulation studies)
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| Fund: This work is financially supported by the National Natural Science Foundation of China (Grant No. 11574153) and the Fund of No. TSXK2022D007. |
Corresponding Authors:
Decai Huang
E-mail: hdc@njust.edu.cn
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Cite this article:
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 2025 Chin. Phys. B 34 104501
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