Electrical conductivity of a metal powder struck by a spark

Ervin Beloni, Priya R. Santhanam, Edward L. Dreizin

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Equivalent resistance of a polydisperse powder layer struck by an electric spark is evaluated. Particles were computationally created and mixed using discrete element method; the mixing protocol homogenized particle size distribution within the sample. The conductivity was determined from the equivalent resistance network for the simulated powder bed. A plasma streamer attached to a particle on top of the sample. For each particle contact, an electrical breakdown was assumed; each individual contact resistance was calculated considering its geometry and plasma resistivity. Results of calculations compare well with the available experimental data.

Original languageEnglish (US)
Pages (from-to)157-165
Number of pages9
JournalJournal of Electrostatics
Volume70
Issue number1
DOIs
StatePublished - Feb 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Keywords

  • Discrete element modeling (DEM)
  • ESD
  • Electrical conductivity
  • Micro-discharge
  • Spherical metal powder

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