Granular Matter

, 10:223 | Cite as

Comparison between two different mesh descriptions used for simulation of sieving processes

  • Hashem Alkhaldi
  • Christian Ergenzinger
  • Florian Fleißner
  • Peter EberhardEmail author


Particle screening is an essential technology in many industrial fields. Related studies are often based on numerical simulations. This paper presents two different approaches for the mesh description used in the simulation of a particle screening process. The particular problem of interest is the separation of round shape particles of different sizes using a tumbling vertical cylinder while the particulate material is continuously fed into its interior. The first mesh model considers a probabilistic approach while the second model deals with the mesh in a very detailed way and considers the contact with individual wires that build up the mesh. The first model has the advantage that it is much simpler. In an attempt to better understand the mechanism of the particle transport between the different layers of the screening system, computational studies for different mesh probability factors have been performed. The results show that the two models have the same trend of results, but no complete agreement is achieved. Although the second model is much more sophisticated and computationally more expensive, the agreement between the two models can be improved by adjusting the probability factor in the first model.


Discrete element method Particle screening Granular material Mesh description Tumbling screening machine 


  1. 1.
    Alkhaldi, H.: Contact investigations of granular mechanical media in a tumbling sorting machine. Dissertation. Schriften aus dem Institut für Technische und Numerische Mechanik 7, Shaker Verlag, Aachen (2007)Google Scholar
  2. 2.
    Alkhaldi, H., Eberhard, P.: Particle screening phenomena in an oblique multi-level tumbling reservoir—a numerical study using discrete element simulation. Granul. Matter 9(6), 415–429 (2007)CrossRefGoogle Scholar
  3. 3.
    Alkhaldi, H., Eberhard, P.: Segregation of particulate material using the discrete element method. In: Proceedings of the IUTAM Symposium on Computational Methods in Contact Mechanics, Hannover, Germany, pp. 342–355 (2006)Google Scholar
  4. 4.
    Coulson, J., Richardson, J.: In: Chemical Engineering. Particle Technology and Separation Processes, vol. 2. Pergamon, Oxford (1991)Google Scholar
  5. 5.
    Cundall, P., Strack, O.: A discrete numerical model for granular assemblies. Geotechnique 29, 47–65 (1979)CrossRefGoogle Scholar
  6. 6.
    Eberhard, P., Alkhaldi, H.: Efficient computation of colliding particles in a vertical tumbling sorting machine. In: Proceedings Second International Congress on Computational Mechanics and Simulation (ICCMS), vol. 1. I.K. Publishing House, New Delhi, pp. 81–87 (2006)Google Scholar
  7. 7.
    Ergenzinger, C.: Experimentelle Untersuchung der Dynamik des Siebvorgangs in einer Taumelsiebmaschine (in German). DIPL-116, Institute of Engineering and Computational Mechanics, University of Stuttgart, Germany (2007)Google Scholar
  8. 8.
    Fleißner, F., Gaugele, T., Eberhard, P.: Applications of the discrete element method in mechanical engineering. Multibody Syst. Dyn. 18(1), 81–94 (2007)zbMATHCrossRefMathSciNetGoogle Scholar
  9. 9.
    Jansen, M., Glastonbury, J.: The size separation of particles by screening. Powder Technol. 1, 334–343 (1967)CrossRefGoogle Scholar
  10. 10.
    Kaye, B., Robb, N.: An algorithm for deducing an effective sieve residue from the rate of powder passage through a sieve. Powder Technol 24, 125–128 (1979)CrossRefGoogle Scholar
  11. 11.
    Li, J., Webb, C., Pandiella, S., Campbell, G.: Discrete particle motion on sieves—a numerical study using the DEM simulation. Powder Technol. 133, 190–202 (2003)CrossRefGoogle Scholar
  12. 12.
    Schiehlen, W., Eberhard, P.: Technische Dynamik (in German). Teubner, Stuttgart (2004)Google Scholar
  13. 13.
    Standish, N.: The kinetics of batch sieving. Powder Technol. 41, 57–67 (1985)CrossRefGoogle Scholar
  14. 14.
    Standish, N., Meta, I.: Some kinetic aspects of continuous screening. Powder Technol. 41, 165–171 (1985)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Hashem Alkhaldi
    • 1
  • Christian Ergenzinger
    • 1
  • Florian Fleißner
    • 1
  • Peter Eberhard
    • 1
    Email author
  1. 1.Institute of Engineering and Computational MechanicsUniversity of StuttgartStuttgartGermany

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