Avalanche Interpretation of the Power-Law Energy Spectrum in Three-Dimensional Dense Granular Flow

Norihiro Oyama, Hideyuki Mizuno, Kuniyasu Saitoh

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Turbulence is ubiquitous in nonequilibrium systems, and it has been noted that even dense granular flows exhibit characteristics that are typical of turbulent flow, such as the power-law energy spectrum. However, studies on the turbulentlike behavior of granular flows are limited to two-dimensional (2D) flow. We demonstrate that the statistics in three-dimensional (3D) flow are qualitatively different from those in 2D flow. We also elucidate that avalanche dynamics can explain this dimensionality dependence. Moreover, we define clusters of collectively moving particles that are equivalent to vortex filaments. The clusters unveil complicated structures in 3D flows that are absent in 2D flows.

Original languageEnglish
Article number188004
JournalPhysical review letters
Volume122
Issue number18
DOIs
Publication statusPublished - 2019 May 10

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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