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Title: Measurements of the collision properties of small spheres

Abstract

An experiment to measure the properties of the collisions between two small spheres or between a small sphere and a semi-infinite flat wall are described. The apparatus releases the particles in a free-fall without initial spin. The impacts are modeled in terms of three coefficients. The first is the coefficient of normal restitution. The second represents the frictional properties of the contact surfaces. The last characterizes the restitution of the tangential components of the velocity of the contact point for impacts that do not involve sliding. The coefficients are calculated from stroboscopic photographs of the ballistics of the particles near the collision. The results establish that the collision model provides an accurate description of the dynamics of the impacts.

Authors:
; ; ;  [1]
  1. (Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853 (United States))
Publication Date:
OSTI Identifier:
5228889
DOE Contract Number:  
AC22-91PC90183
Resource Type:
Journal Article
Journal Name:
Physics of Fluids; (United States)
Additional Journal Information:
Journal Volume: 6:3; Journal ID: ISSN 1070-6631
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GRANULAR MATERIALS; FLOW MODELS; SPHERES; COLLISIONS; FRICTION; MEASURING METHODS; MATERIALS; MATHEMATICAL MODELS; 661300* - Other Aspects of Physical Science- (1992-)

Citation Formats

Foerster, S.F., Louge, M.Y., Chang, H., and Allia, K. Measurements of the collision properties of small spheres. United States: N. p., 1994. Web. doi:10.1063/1.868282.
Foerster, S.F., Louge, M.Y., Chang, H., & Allia, K. Measurements of the collision properties of small spheres. United States. doi:10.1063/1.868282.
Foerster, S.F., Louge, M.Y., Chang, H., and Allia, K. Tue . "Measurements of the collision properties of small spheres". United States. doi:10.1063/1.868282.
@article{osti_5228889,
title = {Measurements of the collision properties of small spheres},
author = {Foerster, S.F. and Louge, M.Y. and Chang, H. and Allia, K.},
abstractNote = {An experiment to measure the properties of the collisions between two small spheres or between a small sphere and a semi-infinite flat wall are described. The apparatus releases the particles in a free-fall without initial spin. The impacts are modeled in terms of three coefficients. The first is the coefficient of normal restitution. The second represents the frictional properties of the contact surfaces. The last characterizes the restitution of the tangential components of the velocity of the contact point for impacts that do not involve sliding. The coefficients are calculated from stroboscopic photographs of the ballistics of the particles near the collision. The results establish that the collision model provides an accurate description of the dynamics of the impacts.},
doi = {10.1063/1.868282},
journal = {Physics of Fluids; (United States)},
issn = {1070-6631},
number = ,
volume = 6:3,
place = {United States},
year = {1994},
month = {3}
}