Rheological response of nonspherical granular flows down an incline

R. C. Hidalgo, B. Szabó, K. Gillemot, T. Börzsönyi, T. Weinhart

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present an extensive numerical and experimental study, investigating a three-dimensional (3D) granular flow of elongated particles down an inclined plane. Similarly to sheared systems, the average particle orientation is found to enclose a small angle with the flow direction. In the bulk, this behavior is independent of the shear rate. At the surface, however, the particles move in more dilute conditions, and the average orientation strongly depends on the shear rate. A systematic numerical study varying the particle aspect ratio and the plane inclination reveals that the particle size perpendicular to the flow direction, deff, is an appropriate length scale to define an effective inertial number Ieff, which fully captures the impact of the particle shape on the system's rheology. Like in the case of spheres, density and friction result in well-defined functions of the effective inertial number Ieff. Thus, we quantify and explain the dependence of the rheological parameters on the aspect ratio, based on the micromechanical details.

Original languageEnglish
Article number074301
JournalPhysical Review Fluids
Volume7
Issue number3
DOIs
Publication statusPublished - Jul 1 2018

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Granular Flow
Shear deformation
Aspect ratio
Rheology
Aspect Ratio
Particle size
Friction
Numerical Study
Inclination
Inclined
Particle Size
Length Scale
Perpendicular
Well-defined
Experimental Study
Quantify
Direction compound
Angle
Three-dimensional

ASJC Scopus subject areas

  • Computational Mechanics
  • Modelling and Simulation
  • Fluid Flow and Transfer Processes

Cite this

Rheological response of nonspherical granular flows down an incline. / Hidalgo, R. C.; Szabó, B.; Gillemot, K.; Börzsönyi, T.; Weinhart, T.

In: Physical Review Fluids, Vol. 7, No. 3, 074301, 01.07.2018.

Research output: Contribution to journalArticle

Hidalgo, R. C. ; Szabó, B. ; Gillemot, K. ; Börzsönyi, T. ; Weinhart, T. / Rheological response of nonspherical granular flows down an incline. In: Physical Review Fluids. 2018 ; Vol. 7, No. 3.
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