Anomalous and non-Gaussian diffusion in Hertzian spheres

doi:10.1016/j.physa.2018.03.034

IMECH-IR > 微重力重点实验室

	Anomalous and non-Gaussian diffusion in Hertzian spheres
	欧阳文泽; Sun B ; Sun ZW(孙祉伟); Xu SH(徐升华)
发表期刊	PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
	2018-09-01
卷号	505 页码:61-68
ISSN	0378-4371
摘要	By means of molecular dynamics simulations, we study the non-Gaussian diffusion in the fluid of Hertzian spheres. The time dependent non-Gaussian parameter, as an indicator of the dynamic heterogeneity, is increased with the increasing of temperature. When the temperature is high enough, the dynamic heterogeneity becomes very significant, and it seems counterintuitive that the maximum of non-Gaussian parameter and the position of its peak decrease monotonically with the increasing of density. By fitting the curves of self intermediate scattering function, we find that the character relaxation time tau(alpha) is surprisingly not coupled with the time tau(max) where the non-Gaussian parameter reaches to a maximum. The intriguing features of non-Gaussian diffusion at high enough temperatures can be associated with the weakly correlated mean-field behavior of Hertzian spheres. Especially the time tau(max) is nearly inversely proportional to the density at extremely high temperatures. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Non-Gaussian diffusion Simulation Hertzian spheres Ultrasoft particles Dynamic heterogeneity
DOI	10.1016/j.physa.2018.03.034
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000437061000006
关键词[WOS]	CORE MODEL ; LIQUID ; FLUID ; HETEROGENEITIES ; TRANSITION ; DYNAMICS ; BEHAVIOR ; MOTION
WOS研究方向	Physics, Multidisciplinary
WOS类目	Physics
项目资助者	National Natural Science Foundation of China [11572322, 11172302]
论文分区	二类
力学所作者排名	1
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/77851
专题	微重力重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China 2.Zhongyuan Univ Technol, Sch Mat & Chem Engn, Zhengzhou 450007, Henan, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	欧阳文泽,Sun B,Sun ZW,et al. Anomalous and non-Gaussian diffusion in Hertzian spheres[J]. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS,2018,505:61-68.
APA	欧阳文泽,Sun B,孙祉伟,&徐升华.(2018).Anomalous and non-Gaussian diffusion in Hertzian spheres.PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS,505,61-68.
MLA	欧阳文泽,et al."Anomalous and non-Gaussian diffusion in Hertzian spheres".PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 505(2018):61-68.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
IrJ2018237.pdf（1047KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载