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Brownian forces in sheared granular matter

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 نشر من قبل Andrea Baldassarri
 تاريخ النشر 2005
  مجال البحث فيزياء
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We present results from a series of experiments on a granular medium sheared in a Couette geometry and show that their statistical properties can be computed in a quantitative way from the assumption that the resultant from the set of forces acting in the system performs a Brownian motion. The same assumption has been utilised, with success, to describe other phenomena, such as the Barkhausen effect in ferromagnets, and so the scheme suggests itself as a more general description of a wider class of driven instabilities.



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