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The anisotropy of free path in a vibro-fluidized granular gas
Mei, Yifeng1; Chen, Yanpei1; Wang, Wei1; Hou, Meiying2
Source PublicationCHINESE PHYSICS B

The free path of a vibro-fluidized two-dimensional (2D) inelastic granular gas confined in a rectangular box is investigated by 2D event-driven molecular simulation. By tracking particles in the simulation, we analyze the local free path. The probability distribution of the free path shows a high tail deviating from the exponential prediction. The anisotropy of the free path is found when we separate the free path to x and y components. The probability distribution of y component is exponential, while x component has a high tail. The probability distribution of angle between the relative velocity and the unit vector joined two particle centers deviates from the distribution of two random vectors, indicating the existence of the dynamic heterogeneities in our system. We explain these results by resorting to the kinetic theory with two-peak velocity distribution. The kinetic theory agrees well with the simulation result.

KeywordFree Path Granular Gases Two-peak Velocity Distribution
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding OrganizationNational Basic Research Program of China(2012CB215003) ; National Natural Science Foundation of China(91334204) ; Chinese Academy of Sciences(XDA07080100) ; China Postdoctoral Science Foundation(2014M561071)
WOS IDWOS:000384264300038
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Soft Matter Phys, Beijing Natl Lab Condense Matter Phys, Inst Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Mei, Yifeng,Chen, Yanpei,Wang, Wei,et al. The anisotropy of free path in a vibro-fluidized granular gas[J]. CHINESE PHYSICS B,2016,25(8):084501.
APA Mei, Yifeng,Chen, Yanpei,Wang, Wei,&Hou, Meiying.(2016).The anisotropy of free path in a vibro-fluidized granular gas.CHINESE PHYSICS B,25(8),084501.
MLA Mei, Yifeng,et al."The anisotropy of free path in a vibro-fluidized granular gas".CHINESE PHYSICS B 25.8(2016):084501.
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