Diffusivity and Weak Clustering in a Quasi 2D Granular Gas - Condensed Matter > Soft Condensed MatterReportar como inadecuado




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Abstract: We present results from a detailed simulation of a quasi-2D dissipativegranular gas, kept in a non-condensed steady state via vertical shaking over arough substrate. This gas shows a weak power-law decay in the tails of its PairDistribution Functions PDF-s, indicating fractality and therefore a tendencyto form clusters over several size scales. This clustering dependsmonotonically on the dissipation coefficient, and disappears when thesphere-sphere collisions are conservative. Clustering is also sensitive to thepacking fraction. This gas also displays the standard nonequilibriumcharacteristics of similar systems, including non-Maxwellian velocitydistributions. The diffusion coefficients are calculated over all theconditions of the simulations, and it is found that diluted gases are morediffusive for smaller restitution coefficients.



Autor: J. A. Perera-Burgos, G. Perez-Angel, Y. Nahmad-Molinari

Fuente: https://arxiv.org/







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