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Discrete particle simulation of radial segregation in horizontally rotating drum: Effects of drum-length and non-rotating end-plates

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  • Chand, Ram
  • Khaskheli, Murad Ali
  • Qadir, Abdul
  • Ge, Baoliang
  • Shi, Qingfan

Abstract

The radial segregation phenomena of a mixture of two different size grains in a horizontal rotating drum are studied by DEM simulations. The grano-dynamics of radial segregation phenomena is examined as a function of the axial length and the friction between grains and not-rotating end-plates of the drum. The results indicate that, in the longer drums, the radial segregation ratio is higher and the friction on the end-plates shows little effect. Whereas in the shorter drums, the radial segregation is very slow or negligible; however, decreasing the friction on non-rotating end-plates increases the segregation ratio. If we increase the friction further (greater than the frictions between the grain-grain and the grains and the inner wall), the segregation ratio drops in the longer drums while in the shorter drums mixing is seen instead. The cause of these phenomena lies in the mechanism of diffusion in granular flows due to shearing strain by the end-plates. For more roughened end-plates, this shearing activity increases the granular temperature of the system and only the mixing can be observed instead of the segregation.

Suggested Citation

  • Chand, Ram & Khaskheli, Murad Ali & Qadir, Abdul & Ge, Baoliang & Shi, Qingfan, 2012. "Discrete particle simulation of radial segregation in horizontally rotating drum: Effects of drum-length and non-rotating end-plates," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 391(20), pages 4590-4596.
    • Handle: RePEc:eee:phsmap:v:391:y:2012:i:20:p:4590-4596
    DOI: 10.1016/j.physa.2012.05.019
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    References listed on IDEAS

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    1. Khakhar, D.V. & Orpe, Ashish V. & Hajra, S.K., 2003. "Segregation of granular materials in rotating cylinders," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 318(1), pages 129-136.
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    Cited by:

    1. Yazdani, Esmaeil & Hashemabadi, Seyed Hassan, 2019. "The influence of cohesiveness on particulate bed segregation and mixing in rotating drum using DEM," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 525(C), pages 788-797.
    2. Reyes, Leonardo & Pérez, Oscar & Colonnello, Claudia & Goncalves, Angélica & Barros, Haydn & Sánchez, Iván & Gutiérrez, Gustavo, 2015. "Characterization of invariant patterns in a slowly rotated granular tumbler," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 419(C), pages 153-157.

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