Mechanism on traveling-wave transport of particles

Hiroyuki Kawamoto*, Kyogo Seki

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    8 Citations (Scopus)


    Numerical and experimental investigations were carried out on transport of particles in an electrostatic traveling field. A 3D hard-sphere model of the Distinct Element Method was developed to simulate dynamics of particles. Forces applied to particles in the model were the Coulomb force, the electrostatic force to polarized particles in the non-uniform field, the gravity, and the air drag. Friction and repulsion between particle-particle and particle-conveyer were included in the model to replace initial conditions after mechanical contacts. Two kinds of experiments were performed to confirm the model. One was the measurement of charge of particles that is indispensable to determine the Coulomb force. Charge distribution was measured from locus of free-fallen particles in a parallel electrostatic field. Averaged charges of bulk particles were confirmed by the measurement with a Faraday cage. The other experiment was measurements of differential dynamics of particles on a conveyer consisting of parallel electrodes to which four-phase traveling electrostatic wave was applied. The calculated results agreed with measured and the following were clarified: (1) Coulomb force is most predominant to drive particles. (2) The direction of particle transport did not always coincide with that of the traveling wave but partially changed depending on the frequency of the traveling wave, the particle diameter, and the electric field. (3) Although some particles overtook the traveling wave at the very low frequency, the motion of particles was almost synchronized with the wave at the low frequency. (4) The transport of some particles delayed to the wave at medium frequency and almost all particles were transported backward at high frequency.

    Original languageEnglish
    Title of host publicationInternational Conference on Digital Printing Technologies
    Number of pages8
    Publication statusPublished - 2004
    EventFinal Program and Proceedings of IS and T's NIP20: International Conference on Digital Printing Technologies - Salt Lake City, UT
    Duration: 2004 Oct 312004 Nov 5


    OtherFinal Program and Proceedings of IS and T's NIP20: International Conference on Digital Printing Technologies
    CitySalt Lake City, UT

    ASJC Scopus subject areas

    • Media Technology


    Dive into the research topics of 'Mechanism on traveling-wave transport of particles'. Together they form a unique fingerprint.

    Cite this