Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-06-08
Physics
Condensed Matter
Statistical Mechanics
41 pages, 11 figures
Scientific paper
The impact of a two-dimensional elastic disk with a wall is numerically studied. It is clarified that the coefficient of restitution (COR) decreases with the impact velocity. The result is not consistent with the recent quasi-static theory of inelastic collisions even for very slow impact. This suggests that the elastic model cannot be used in the quasi-static limit. A new quasi-static theory of impacts is proposed, in which the effect of thermal diffusion is dominant. The abrupt decrease of COR has been found due to the plastic deformation of the disk, which is assisted by the initial internal motion. (This paper is to be published in Chemical Engineering Science.)
Hayakawa Hisao
Kuninaka Hiroto
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