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Drag Induced Lift in Granular Media

Yang Ding, Nick Gravish, and Daniel I. Goldman
Phys. Rev. Lett. 106, 028001 – Published 13 January 2011
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Abstract

Laboratory experiments and numerical simulation reveal that a submerged intruder dragged horizontally at a constant velocity within a granular medium experiences a lift force whose sign and magnitude depend on the intruder shape. Comparing the stress on a flat plate at varied inclination angle with the local surface stress on the intruders at regions with the same orientation demonstrates that intruder lift forces are well approximated as the sum of contributions from flat-plate elements. The plate stress is deduced from the force balance on the flowing media near the plate.

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  • Received 31 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.028001

© 2011 The American Physical Society

Synopsis

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Grainy picture

Published 18 January 2011

Experiments and modeling point to the optimal shapes for enhancing lift or drag forces on objects moving in granular media.

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Authors & Affiliations

Yang Ding, Nick Gravish, and Daniel I. Goldman*

  • School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

  • *daniel.goldman@physics.gatech.edu

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Issue

Vol. 106, Iss. 2 — 14 January 2011

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