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Granular Matter

, 21:111 | Cite as

Segregation of granular materials in a pulsating pumping regime

  • Martin A. HausteinEmail author
  • Ge Zhang
  • Rüdiger Schwarze
Original Paper
  • 93 Downloads

Abstract

The segregation of particles in a granular material is a well known effect of high importance in many industries. Concentrated suspensions like concrete are strongly influenced by the behavior of the coarse aggregates. In these suspensions, the segregation also occurs, especially during the transport of the material through pipes. Typically, concrete is pumped by using double piston pumps leading to a pulsating pumping regime in contrast to a linear (continuous) pumping. This paper shows the behavior of particles during the pulsating pumping regime and the migration in the tube axis. Discrete element simulations of dry, bidisperse materials were carried out to show the influence of material parameters and the segregation behavior. Detailed understanding of the dry material behavior is of great importance for the interpretation of characteristic phenomena, which can be also found in concentrated suspensions, like the formation of a lubrication layer during the concrete pumping.

Keywords

Discrete element method Particle segregation Pumping Concrete Micro–macro transition 

Notes

Acknowledgements

Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) – Projektnummer 387065607, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Projektnummer 387065607.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Martin A. Haustein
    • 1
    Email author
  • Ge Zhang
    • 2
  • Rüdiger Schwarze
    • 1
  1. 1.Institute of Mechanics and Fluid DynamicsTU Bergakademie FreibergFreibergGermany
  2. 2.Institute of Applied Physics and Computational MathematicsBeijingPeople’s Republic of China

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