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Title: Asymmetric and long range interactions in shaken granular media
Author: Codina Sala, Joan
Pagonabarraga Mora, Ignacio
Keywords: Processos estocàstics
Mecànica estadística del no equilibri
Materials granulars
Stochastic processes
Nonequilibrium statistical mechanics
Granular materials
Issue Date: 30-Oct-2019
Publisher: American Institute of Physics
Abstract: We use a computational model to investigate the emergence of interaction forces between pairs of intruders in a horizontally vibrated granular fluid. The time evolution of a pair of particles shows a maximum of the likelihood to find the pair at contact in the direction of shaking. This relative interaction is further studied by fixing the intruders in the simulation box where we identify effective mechanical forces and torques between particles and quantify an emergent long range attractive force as a function of the shaking relative angle, the amplitude, and the packing density of grains. We determine the local density and kinetic energy profiles of granular particles along the axis of the dimer to find no gradients in the density fields and additive gradients in the kinetic energies.
Note: Reproducció del document publicat a:
It is part of: Journal of Chemical Physics, 2019, vol. 151, num. 16, p. 164903
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ISSN: 0021-9606
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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