Frequency–amplitude behavior in the incipient movement of grains under vibration--颗粒学报PARTICUOLOGY

Valenzuela Aracena, K. A., Benito, J. G., Oger, L., Ippolito, I., Uñac, R. O., & Vidales, A. M. (2018). Frequency–amplitude behavior in the incipient movement of grains under vibration. Particuology, 40, 1-9. https://doi.org/10.1016/j.partic.2017.11.009

Frequency–amplitude behavior in the incipient movement of grains under vibration

Karina A. Valenzuela Aracena ^a, Jesica G. Benito ^a, Luc Oger ^b, Irene Ippolito^c, Rodolfo O. Uñac ^a, Ana M. Vidales ^a *

a INFAP, CONICET, Departamento de Física, Facultad de Ciencias Físico Matemáticas y Naturales, Universidad Nacional de San Luis, Ejército de los Andes 950, D5700HHW, San Luis, Argentina
b Institut de Physique de Rennes, UMR UR1-CNRS 6251, Université de Rennes 1, 263, Avenue du Général Leclerc, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex, France
c Universidad de Buenos Aires, Facultad de Ingeniería, Grupo de Medios Porosos, Paseo Colón 850, 1063, Buenos Aires, Argentina

10.1016/j.partic.2017.11.009

Volume 40, October 2018, Pages 1-9

Received 4 August 2017, Revised 2 October 2017, Accepted 15 November 2017, Available online 26 March 2018, Version of Record 28 July 2018.

E-mail: avidales@unsl.edu.ar

Highlights

• Amplitude–frequency thresholds for incipient movement of vibrated beads were determined.

• The behavior was independent of the relative size between moving particles and surface roughness.

• We modeled the results using a forced damped oscillator linking the particles to the surface.

• Discrete element method simulation described qualitatively well the experimental results.

Abstract

The onset of the movement of particles placed on a horizontal rough surface subject to a vertical sinusoidal vibration is investigated through tracking experiments, theoretical analysis, and numerical simulations. The frequency of vibration needed to move particles decays exponentially with the amplitude of the oscillatory input. This behavior is explained through a simple mechanism in which a forced damped harmonic oscillator with a spring constant represents all the interactions between the particle and the surface. The numerical results compare well with experimental data, demonstrating that the forces included in the numerical calculations suitably account for the main particle response, even though the complexity of the surface is not fully taken into account. Describing the way in which frequency varies with amplitude could be relevant to technological applications such as cleaning of material surfaces.

Graphical abstract

Keywords

Vibration; Incipient movement; Forced oscillator; 3D DEM simulation

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