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  • PACS. 81.05.Rm Porous materials; granular materials - 83.70.Fn Granular solids  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Molecular dynamics of comminution in ball mills (2000)
    Springer
    The European physical journal 16 (2000), S. 169-182 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 81.05.Rm Porous materials; granular materials - 83.70.Fn Granular solids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We investigate autogenous fragmentation of dry granular material in rotating cylinders using two-dimensional molecular dynamics. By evaluation of spatial force distributions achieved numerically for various rotation velocities we argue that comminution occurs mainly due to the existence of force chains. A statistical analysis of these force chains explains the spatial distribution of comminution efficiency in ball mills as measured experimentally by Rothkegel [1] and Rolf [2]. For animated sequences of our simulations see http://summa.physik.hu-berlin.de/ kies/mill/bm.html
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00011052
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  • 2
    Electronic Resource
    Electronic Resource
    Rolling as a “continuing collision” (1999)
    Springer
    The European physical journal 12 (1999), S. 299-301 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 81.05.Rm Porous materials; granular materials - 83.70.Fn Granular solids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We show that two basic mechanical processes, the collision of particles and rolling motion of a sphere on a plane, are intimately related. According to our recent findings, the restitution coefficient for colliding spherical particles , which characterizes the energy loss upon collision, is directly related to the rolling friction coefficient for a viscous sphere on a hard plane. We quantify both coefficients in terms of material constants which allows to determine either of them provided the other is known. This relation between the coefficients may give rise to a novel experimental technique to determine alternatively the coefficient of restitution or the coefficient of rolling friction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510051007
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