Numerical simulation of the impact and deposition of charged particulate droplets

  • Authors:
  • T. I. Zohdi

  • Affiliations:
  • Department of Mechanical Engineering, 6195 Etcheverry Hall, University of California, Berkeley, CA 94720-1740, USA

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2013

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Abstract

This work addresses the impact and deposition of charged ''cluster-droplets'', comprised of particulates, on electrified surfaces. A direct numerical method is developed, based on an implicit, staggered, time-stepping scheme which separates the impulsive and continuous forces between particles, in conjunction with an iterative solution method that automatically adapts the time-step sizes to control the rates of convergence within a time-step. This approach is used to investigate the post-impact structure of charged particulate cluster-droplets. Particulate cluster-droplet impact has wide-ranging application to areas such as inkjet printing, sprays, coatings, etc. A series of numerical examples are provided, where we investigate the effect of progressively increasing the electric field strength on the impacted substrate, leading to a more coherent cluster deposition. An analysis is also provided for the interaction of charged cluster-droplets with electromagnetic fields.