Artículo
Influence of rotations in energy transfer of a particle colliding on a flat surface
Fernández, Fabricio Éric; Aguirre, Maria Alejandra
; Martino, Román Gustavo
; Boschan, Alejandro
; Piva, Marcelo Fabian
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Fecha de publicación:
07/2024
Editorial:
Elsevier Science SA
Revista:
Powder Technology
ISSN:
0032-5910
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
To understand the influence of rotations on the dissipation of energy in the interaction between a grain and its environment, we investigate the relaxation process of a single particle bouncing on a flat horizontal surface. For this purpose, faceted particles were used to promote the appearance of rotations in each bounce. The evolution of potential, translational and rotational kinetic energies was analysed during the whole relaxation process, particularly focusing on the behaviour just before and after each collision. The rebounding action of an individual grain results in energy dissipation commonly quantified by ϵ, the coefficient of restitution. This coefficient is defined as the ratio of the normal velocity component prior to impact (Vn) to the corresponding component immediately following the collision (V ′ n ), i.e. related to translational kinetic energy associated with motion in the normal direction. We identify a critical impact velocity below which, in certain collisions, ϵ > 1. This phenomenon can be attributed to stored rotational kinetic energy which is transferred to translational kinetic energy during the collision, thereby increasing the normal velocity V ′ n and resulting in the observed high values of ϵ.
Palabras clave:
COEFFICIENT OF RESTITUTION
,
ENERGY DISSIPATION
,
PARTICLE COLLISION
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Articulos(IDIT)
Articulos de INSTITUTO DE ESTUDIOS AVANZADOS EN INGENIERIA Y TECNOLOGIA
Articulos de INSTITUTO DE ESTUDIOS AVANZADOS EN INGENIERIA Y TECNOLOGIA
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Fernández, Fabricio Éric; Aguirre, Maria Alejandra; Martino, Román Gustavo; Boschan, Alejandro; Piva, Marcelo Fabian; Influence of rotations in energy transfer of a particle colliding on a flat surface; Elsevier Science SA; Powder Technology; 445; 120100; 7-2024; 1-10
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