Work

Asymmetric and long range interactions in shaken granular media

Year: 2019

Type: article

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.

Source: The Journal of Chemical Physics

DOI: 10.1063/1.5123304

Authors: Joan Codina, Ignacio Pagonabarraga

Institutions: Chinese Academy of Sciences, Institute of Physics, Wenzhou Institute, University of Chinese Academy of Sciences, Universitat de Barcelona, École Polytechnique Fédérale de Lausanne

Language: English

Topic: Granular flow and fluidized beds

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Ministerio de Educación, Cultura y Deporte, Ministerio de Asuntos Económicos y Transformación Digital, Gobierno de España, Departament d'Universitats, Recerca i Societat de la Informació