Granular drag on a discrete object: Shape effects on jamming

I. Albert; J. G. Sample; A. J. Morss; S. Rajagopalan; A.-L. Barabási; P. Schiffer

doi:10.1103/PhysRevE.64.061303

Granular drag on a discrete object: Shape effects on jamming

I. Albert, J. G. Sample, A. J. Morss, S. Rajagopalan, A.-L. Barabási, and P. Schiffer

Phys. Rev. E 64, 061303 – Published 7 November 2001

Abstract

We study the drag force on discrete objects with circular cross section moving slowly through a spherical granular medium. Variations in the geometry of the dragged object change the drag force only by a small fraction relative to shape effects in fluid drag. The drag force depends quadratically on the object’s diameter as expected. We do observe, however, a deviation above the expected linear depth dependence, and the magnitude of the deviation is apparently controlled by geometrical factors.

Received 18 July 2001

DOI:https://doi.org/10.1103/PhysRevE.64.061303

Authors & Affiliations

I. Albert¹, J. G. Sample¹, A. J. Morss², S. Rajagopalan², A.-L. Barabási¹, and P. Schiffer^2,*

¹Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
²Department of Physics and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802

^*Corresponding author; Email address: schiffer@phys.psu.edu

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Vol. 64, Iss. 6 — December 2001

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