Anomalous wave reflection from the interface of two strongly nonlinear granular media
arXiv:cond-mat/0506349 · doi:10.1103/PhysRevLett.95.158702
Abstract
Granular materials exhibit a strongly nonlinear behaviour affecting the propagation of information in the medium. Dynamically self-organized strongly nonlinear solitary waves are the main information carriers in granular chains. Here we report the first experimental observation of the dramatic change of reflectivity from the interface of two granular media triggered by a noncontact magnetically induced initial precompression. It may be appropriate to name this phenomenon the "acoustic diode" effect. Based on numerical simulations, we explain this effect by the high gradient of particle velocity near the interface.
arXiv comment14 pages, 3 figures
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