Drag Law of Two Dimensional Granular Fluids

Abstract

The drag force law acting on a moving circular disk in a two-dimensional granular medium is analyzed based on the discrete element method (DEM). It is remarkable that the drag force on the moving disk in moderate dense and pure two-dimensional granular medium can be well reproduced by a perfect fluid with separation from the surface of the tracer. A yield force, being independent of the moving speed of the disk, appears if a dry friction between the granular disks and the bottom plate exists. The perfect fluidity is violated in this case. The yield force and the drag force diverge at the jamming point.

13 pages, 6 figures (to be published in J. Eng. Mech.)

References in corpus (10)

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Cited by in corpus (8)

• Drag acting on an intruder in a three-dimensional granular environment
• Micromechanics of intruder motion in wet granular medium
• Effective drag of a rod in fluid-saturated granular beds
• Reducing segregation in vibrated binary-sized granular mixtures by excessive small particle introduction
• Drag anisotropy of cylindrical solids in fluid-saturated granular beds
• Intruder Dynamics in a Frictional Granular Fluid: A Molecular Dynamics Study
• Particle flows around an intruder
• Viscous dynamics of drops and bubbles in Hele-Shaw cells: drainage, drag friction, coalescence, and bursting