中国物理B ›› 2013, Vol. 22 ›› Issue (5): 54701-054701.doi: 10.1088/1674-1056/22/5/054701

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Imperfect pitchfork bifurcation in asymmetric two-compartment granular gas

张因a, 李寅阊a, 刘锐a, 崔非非b, Pierre Evesquec, 厚美瑛a   

  1. a Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Department of Physics, Beijing Institute of Technology, Beijing 100081, China;
    c Laboratory MSSMat, UMR 8579 CNRS, Ecole Centrale Paris, 92295 Chatenay-Malabry, France
  • 收稿日期:2012-12-04 修回日期:2012-12-23 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11034010 and 11274354), the Chinese Academy of Sciences "Strategic Priority Research Program - SJ-10" (Grant No. XDA04020200), and the Special Fund for Earthquake Research of China (Grant No. 201208011).

Imperfect pitchfork bifurcation in asymmetric two-compartment granular gas

Zhang Yin (张因)a, Li Yin-Chang (李寅阊)a, Liu Rui (刘锐)a, Cui Fei-Fei (崔非非)b, Pierre Evesquec, Hou Mei-Ying (厚美瑛)a   

  1. a Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Department of Physics, Beijing Institute of Technology, Beijing 100081, China;
    c Laboratory MSSMat, UMR 8579 CNRS, Ecole Centrale Paris, 92295 Chatenay-Malabry, France
  • Received:2012-12-04 Revised:2012-12-23 Online:2013-04-01 Published:2013-04-01
  • Contact: Hou Mei-Ying E-mail:mayhou@aphy.iphy.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11034010 and 11274354), the Chinese Academy of Sciences "Strategic Priority Research Program - SJ-10" (Grant No. XDA04020200), and the Special Fund for Earthquake Research of China (Grant No. 201208011).

摘要: The clustering behavior of a mono-disperse granular gas is experimentally studied in an asymmetric two-compartment setup. Unlike the random clustering in either compartment in the case of symmetric configuration when lowering the shaking strength to below a critical value, the directed clustering is observed, which corresponds to an imperfect pitchfork bifurcation. Numerical solutions of the flux equation using a modified simple flux function show qualitative agreements with the experimental results. The potential application of this asymmetric structure is discussed.

关键词: compartmentalized granular gases, directed clustering, imperfect pitchfork bifurcation

Abstract: The clustering behavior of a mono-disperse granular gas is experimentally studied in an asymmetric two-compartment setup. Unlike the random clustering in either compartment in the case of symmetric configuration when lowering the shaking strength to below a critical value, the directed clustering is observed, which corresponds to an imperfect pitchfork bifurcation. Numerical solutions of the flux equation using a modified simple flux function show qualitative agreements with the experimental results. The potential application of this asymmetric structure is discussed.

Key words: compartmentalized granular gases, directed clustering, imperfect pitchfork bifurcation

中图分类号:  (Nonlinearity, bifurcation, and symmetry breaking)

  • 47.20.Ky
45.70.-n (Granular systems) 05.70.Ln (Nonequilibrium and irreversible thermodynamics)