Methodology for studying particle-particle triboelectrification in granular materials

Keith M. Forward, Daniel J. Lacks, R. Mohan Sankaran

Research output: Contribution to journalArticlepeer-review


A critical challenge for experimental studies of triboelectric charging is to generate reproducible and unambiguous data that can be linked to theoretical concepts. We have developed a methodology to investigate the triboelectric charging of granular materials due solely to particle-particle interactions (i.e. no particle-wall interactions). The methodology is based on a particle flow apparatus that generates a fountain-like flow in which the particles contact only other particles, but no equipment surfaces. Non-contact methods of measuring charge and separating particles by charge are employed so that probe-particle charging does not occur.

Original languageEnglish (US)
Pages (from-to)178-183
Number of pages6
JournalJournal of Electrostatics
Issue number2-3
StatePublished - May 2009
Externally publishedYes


  • Fluidized bed
  • Granular material
  • Particle charging
  • Triboelectrification

ASJC Scopus subject areas

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


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