EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Particle Shape Effects|
|Published online||07 June 2021|
Energy dissipation of a particle colliding on a flat surface
Grupo de Medios Porosos, Fac. de Ingeniería, Universidad de Buenos Aires, Paseo Colón 850, (C1063ACV) Buenos Aires, Argentina.
2 IDIT – CONICET - Universidad Nacional de Córdoba, Av. Velez Sarsfield 1611, (5000) Córdoba, Argentina.
3 Grupo de Medios Porosos, Fac. de Ingeniería, Universidad de Buenos Aires, CONICET, Paseo Colón 850, (C1063ACV) Buenos Aires, Argentina.
* Corresponding author: email@example.com
Published online: 7 June 2021
To gain an understanding of the factors affecting the interaction of one grain with its environment as it reaches equilibrium, we study a particle bouncing off a flat surface. The bouncing of the particle leads to dissipation that is usually characterized with t, the coefficient of restitution, defined as the ratio between the velocity component that is normal to the contact surface just before impact (Vn) and the same component, but immediately after the collision (Vn’), i.e. related to a kinetic energy corresponding to motion in the normal direction. We will show how d is affected by energy stored in other degrees of freedom and transferred to kinetic energy that leads to an increase in normal velocity after the impact Vn’, and therefore to, ɛ >1. For this purpose, the evolution of potential, translational kinetic energy and rotational kinetic energy is analysed during the whole relaxation process and just before and after each collision for two different types of particle, a disk and a faceted particle.
A video is available at https://doi.org/10.48448/dw75-fj74
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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