Volume 8, Issue 1 (January 2011)

    Triboelectrification of Metallic Dust Particles: Experiment and Modeling

    (Received 5 April 2010; accepted 28 October 2010)

    Published Online: 2010

    CODEN: JAIOAD

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    Abstract

    Particles acquire electrostatic charges due to repeated collisions with a wall or surface due to a phenomenon termed as tribocharging. Triboelectric separation involves the charging of particles by impact or friction with the walls of a container or a pipe or between each other. It is suspected to be the cause of many industrial incidents and accidents and is recognized to be an industrial hazard. The contamination of particles in an unclean oxygen system, particularly with bends, valves, and regulators, makes it vulnerable to a fire hazard. Particles (both metallic and non-metallic) may be generated over years of operation inside an initially clean system. The particles are added through fresh gases, turning of screws and valves, abrasion, and wear of surfaces either by personnel or by production equipment. The phenomenon of electrostatic charge generation due to the impact between metallic particles and the pipe wall is investigated experimentally and theoretically. The experimentation and simulations have been performed with mild steel particles. The effects of air velocity, pipe diameter, and pipe length on the extent of tribocharging of particles have been determined. The velocity profiles of particles have been found out utilizing the FLUENT 6.3.26 code, and the charges generated are calculated from this velocity. Numerical results for the tribocharging of particles have been validated with the experimental ones.


    Author Information:

    Oza, Aditi
    Research Scholar, Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal

    Ghosh, Sudipto
    Associate Professor, Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, West Bengal

    Chowdhury, Kanchan
    Professor, Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal


    Stock #: JAI103113

    ISSN: 1546-962X

    DOI: 10.1520/JAI103113

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    Author
    Title Triboelectrification of Metallic Dust Particles: Experiment and Modeling
    Symposium , 0000-00-00
    Committee G04