Electrical conduction of granular media: Experimental and numerical studies

Junghwoon Lee, Tae Sup Yun

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

1 Citation (Scopus)

Abstract

This study presents the evolutionary behavior of electrical conduction for granular mixtures dominated by the volumetric fraction of each constituent, relative sizes, and stress condition. The chrome balls and glass beads are mixed with varying volumetric fraction and relative size ratio. The two-electrode method is used to obtain electrical conductance at different loading stages for each mixture. Three relative sizes of glass beads with respect to chrome balls are tested. As the size ratio determines the spatial configuration and corresponding connectivity of conductive granules in mixtures, the electrical conductance shows the unique evolution with varying volumetric fraction. The discrete element method is also implemented to capture the inter-particle connectivity of conductive granules. Experimental results and numerical simulation conclude that not only the fraction of conductive particles but also long range of interconnectivity of particles construct the electrical percolation path that enables carrying the electric current. This study highlights that energy transfer in granular packing can be optimized by controlling suggested dominant factors.

Original languageEnglish
Title of host publicationGeoCongress 2012
Subtitle of host publicationState of the Art and Practice in Geotechnical Engineering
Pages2362-2371
Number of pages10
Edition225 GSP
DOIs
Publication statusPublished - 2012 Dec 1
EventGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering - Oakland, CA, United States
Duration: 2012 Mar 252012 Mar 29

Publication series

NameGeotechnical Special Publication
Number225 GSP
ISSN (Print)0895-0563

Other

OtherGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering
CountryUnited States
CityOakland, CA
Period12/3/2512/3/29

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Lee, J., & Yun, T. S. (2012). Electrical conduction of granular media: Experimental and numerical studies. In GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering (225 GSP ed., pp. 2362-2371). (Geotechnical Special Publication; No. 225 GSP). https://doi.org/10.1061/9780784412121.242