Particle Technology and Fluidization

Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles

  1. M. A. Mokhtar1,
  2. K. Kuwagi1,*,
  3. T. Takami1,
  4. H. Hirano2,
  5. M. Horio3

Article first published online: 18 APR 2011

DOI: 10.1002/aic.12568

Issue

AIChE Journal

AIChE Journal

Volume 58, Issue 1, pages 87–98, January 2012

Additional Information

How to Cite

Mokhtar, M. A., Kuwagi, K., Takami, T., Hirano, H. and Horio, M. (2012), Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles. AIChE J., 58: 87–98. doi: 10.1002/aic.12568

Author Information

  1. 1

    Dept. of Mechanical Systems Engineering, Faculty of Engineering, Okayama University of Science, Ridai-Cho 1-1, Okayama 700-0005, Japan

  2. 2

    Dept. of Biotechnology and Applied Chemistry, Faculty of Science, Okayama University of Science, Ridai-Cho 1-1, Okayama 700-0005, Japan

  3. 3

    Research Institute of Science and Technology for Society (RISTEX), Japan Science and Technology Agency (JST), Ohte-machi 1-1-2, Chiyoda-ku, Tokyo 100-0004, Japan

*Dep. of Mechanical Systems Engineering, Faculty of Engineering, Okayama University of Science, Ridai-Cho 1-1, Okayama 700-0005, Japan

Publication History

  1. Issue published online: 7 DEC 2011
  2. Article first published online: 18 APR 2011
  3. Accepted manuscript online: 24 JAN 2011 10:39AM EST
  4. Manuscript Revised: 12 DEC 2010
  5. Manuscript Received: 7 MAR 2010

Funded by

  • Ministry of Education, Cultural, Sports, Science and Technology of Japan through the Financial Assistance Program of the Social Cooperation Study (2006–2010)

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Keywords:

  • discrete element method;
  • fluidized bed;
  • bubbling fluidization;
  • homogeneous fluidization;
  • bubble analysis

Abstract

The similar particle assembly (SPA) model proposed for large-scale discrete element method simulation was validated. The SPA model describes the scaling law for the motion of particles in an assembly, which is derived from the equation of motion of a particle. In the SPA model, particles with similar physical or chemical properties are represented by a single particle, which is called the representative particle. The local assembly of particles in the original bed is supposed to be maintained in the bed with the representative particles. The SPA model was validated by numerical simulations of a 2D fluidized bed of noncohesive and cohesive particles. Using the SPA model, the flow behavior of the representative particles of a certain magnification can be made similar to that of the original particles with significantly less computational load. A good approximation of bubble size distribution between the SPA bed and the original bed was obtained. © 2011 American Institute of Chemical Engineers AIChE J, 2012

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