Universal scaling laws of diffusion in two-dimensional granular liquids

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题名:	Universal scaling laws of diffusion in two-dimensional granular liquids
作者:	陳培亮;Wang, Chen-Hung;Yu, Szu-Hsuan;Chen, Peilong
贡献者:	理學院物理學系
日期:	2015-06-01
上传时间:	2026-04-23 14:46:49 (UTC+8)
出版者:	American Physical Society;United States
摘要:	摘要： We find, in a two-dimensional air table granular system, that the reduced diffusion constant D* and excess entropy S(2) follow two distinct scaling laws: D∼e(S(2)) for dense liquids and D∼e(3S(2)*) for dilute ones. The scaling for dense liquids is very similar to that for three-dimensional liquids proposed previously [M. Dzugutov, Nature (London) 381, 137 (1996); A. Samanta et al., Phys. Rev. Lett. 92, 145901 (2004)]. In the dilute regime, a power law [Y. Rosenfeld, J. Phys.: Condens. Matter 11, 5415 (1999)] also fits our data reasonably well. In our system, particles experience low air drag dissipation and interact with each others through embedded magnets. These near-conservative many-body interactions are responsible for the measured Gaussian velocity distribution functions and the scaling laws. The dominance of cage relaxations in dense liquids leads to the different scaling laws for dense and dilute regimes. 其他題名： Phys Rev E Stat Nonlin Soft Matter Phys 出版者： United States 出版日期： 2015-06 出處： Physical review. E, Statistical, nonlinear, and soft matter physics, 2015-06, Vol.91 (6), p.060201, Article 060201 識別號： ISSN: 1539-3755 識別號： ISSN: 1550-2376 識別號： EISSN: 1550-2376 識別號： DOI: 10.1103/PhysRevE.91.060201 識別號： PMID: 26172645
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