Force Statistics and Correlations in Dense Granular Packings

M.K Müller, Stefan Luding, Thorsten Pöschel

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)
44 Downloads (Pure)

Abstract

In dense, static, polydisperse granular media under isotropic pressure, the probability density and the correlations of particle-wall contact forces are studied. Furthermore, the probability density functions of the populations of pressures measured with different sized circular pressure cells are examined. The questions answered are: (i) What is the number of contacts that has to be considered so that the measured pressure lies within a certain error margin from its expectation value? (ii) What is the statistics of the pressure probability density as function of the size of the pressure cell? Astonishing non-random correlations between contact forces are evidenced that lead to a rapid decay of the width of the distribution and range at least 10–15 particle diameters. Finally, an experiment is proposed to tackle and better understand this issue.
Original languageEnglish
Pages (from-to)600-605
Number of pages5
JournalChemical physics
Volume375
Issue number2-3
DOIs
Publication statusPublished - 2010

Keywords

  • Force and stress correlations
  • METIS-272349
  • Dense static granular packings
  • Pressure cells
  • DEM simulations
  • IR-80373

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