Tapped granular packings described as complex networks |
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Authors: | Roberto Arévalo Luis A Pugnaloni Diego Maza Iker Zuriguel |
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Institution: | 1. CNR-SPIN, Dipartimento di Scienze Fisiche, Universitá di Napoli “Federico II”, Naples, Italy.roberto.arevaloturnes@spin.cnr.it;3. Departamento de Ingeniería Mecánica, Facultad Regional La Plata, Universidad Tecnológica Nacional, Av. 60 esq. 124 s/n, 1900 La Plata, Argentina.;4. Departamento de Física, Facultad de Ciencias, Universidad de Navarra, E-31080 Pamplona, Spain. |
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Abstract: | AbstractWe characterize the structure of simulated two-dimensional granular packings using concepts from complex networks theory. The packings are generated by a simulated tapping protocol, which allows us to obtain states in mechanical equilibrium in a wide range of densities. We show that our characterization method is able to discriminate non-equivalent states that have the same density. We do this by examining differences in the topological structure of the contact network of the packings. In particular, we find that the polygons of the network are specially sensitive probes for the contact structure. Additionally, we compare the network properties obtained in two different scenarios: the tapped and a compressed system. |
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Keywords: | granular media tapping force network contact network contact topology equilibrium states |
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