Giant electrical fluctuations in metallic disordered packings |
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| Authors: | N Vandewalle S Dorbolo |
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| Institution: | (1) GRASP, Institut de Physique B5, Université de Liège, B-4000 Liège, Belgium, BE |
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| Abstract: | We have experimentally studied granular arches through electrical measurements. The packing is composed of 2d metallic pentagons and is submitted to small taps. Large electrical fluctuations are observed and they are distributed along
power laws. This indicates the presence of long-time memory effects even the packing density remains constant around a value
ρ = 0.72±0.02. Large electrical fluctuations should be associated with the breaking/creation of granular arches.
Received 3 October 2000 |
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| Keywords: | PACS 45 70 -n Granular systems – 05 40 -a Fluctuation phenomena random processes noise and Brownian motion – 81 05 Rm Porous materials granular materials |
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