Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis of Particle Packing Process by Contact Model in Discrete Element Method

입자 패킹 공정에 대한 접촉모델별 이산요소법 해석

  • Lyu, Jaehee (Department of Mechanical Design Engineering, Kumoh National Institute of Technology) ;
  • Park, Junyoung (Department of Mechanical Design Engineering, Kumoh National Institute of Technology)
  • 유재희 (금오공과대학교 기계설계공학과) ;
  • 박준영 (금오공과대학교 기계설계공학과)
  • Received : 2019.01.18
  • Accepted : 2019.01.28
  • Published : 2019.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

In many industries, particle packing is adopted quite frequently. In the particle packing process, the Discrete Element Method (DEM) can analyze the multi-collision of particles efficiently. Two types of contact models are frequently used for the DEM. One is the linear spring model, which has the fastest calculation time, and the other is the Hertz-Mindlin model, which is the most frequently used contact model employing the DEM. Meanwhile, very tiny particles in the micrometer order are used in modern industries. In the micro length order, surface force is important to decreased particle size. To consider the effect of surface force in this study, we performed a simulation with the Hertz-Mindlin model and added the Johnson-Kendall-Roberts (JKR) theory depicting surface force with surface energy. In addition, three contact models were compared with several parameters. As a result, it was found that the JKR model has larger residual stress than the general contact models because of the pull-off force. We also validated that surface force can influence particle behavior if the particles are small.

Keywords

References

  1. Wikipedia, "Rhodium powder pressed melted," (2018) https://en.wikipedia.org/wiki/File:Rhodium_powder_pressed_melted.jpg (accessed 04, Oct., 2018)
  2. Johnson, K. L., Contact mechanics, Cambridge Publication, pp. 84-125, 1985.
  3. Johnson, K. L., Kendall, K. and Robert, A. D., "Surface Energy and the Contact of Elastic Solids", Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 324, No. 1558, pp. 301-313, 1971. https://doi.org/10.1098/rspa.1971.0141
  4. Tsunazawa, Y., Fujihashi, D., Fukui, S., Sakai, M., and Tokoro, C., "Contact force model including the liquid-bridge force for wet-particle simulation using the discrete element method", Advanced Powder Technology, Vol. 27, pp. 652-660, 2016. https://doi.org/10.1016/j.apt.2016.02.021
  5. Hu, G., Hu, Z., Jian, B., Liu, L., and Wan, H., "On the determination of the damping coefficient of non-linear spring-dashpot system to model hertz contact for simulation by discrete element method", Journal of computers, Vol. 6, No. 5, 2011.
  6. Gan, J. Q., Yu, A. B., and Zhou, Z. Y., "DEM simulation on the packing of fine ellipsoids", Chemical Engineering Science", Vol. 156, pp. 64-76, 2016. https://doi.org/10.1016/j.ces.2016.09.017
  7. He, Y., Evans, T. J., Yu, A.B., and Yang, R.Y., "Numerical Modelling of Die and Unconfined Compactions of Wet Particles", Procedia Engineering, Vol. 102, pp. 1390-1398, 2015. https://doi.org/10.1016/j.proeng.2015.01.271

Cited by

  1. CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model vol.14, pp.8, 2021, https://doi.org/10.3390/en14082276