Title page for 92222003


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Student Number 92222003
Author Chao-Chung Wu(§d·Ó¤¤)
Author's Email Address chaochungwu@yahoo.com.tw
Statistics This thesis had been viewed 1319 times. Download 294 times.
Department Physics
Year 2004
Semester 2
Degree Master
Type of Document Master's Thesis
Language English
Title Dynamics of Rods in 2D Vertical Soap Films
Date of Defense 2005-07-11
Page Count 34
Keyword
  • rod
  • soap film
  • Abstract We present an experimental characterization of dynamics of a cylindrical rod in a vertically flowing soap film. The rod is setup to be capable of rotating freely in the soap film. The Steady(S), Fluttering(F), and Rotating(R) motions of the rods are observed, and there are two kinds of transitional motions ¡VFluttering-Rotating(FR) mix, and Dull(D). The dynamics of the flow field in the soap film and the transitions between different rod motions have been studied under different physical parameters
    of the rod and soap film. We find out a dimensionless parameter(P) to describe the
    transitions of the rod¡¦s motions, which in the vertically flowing soap films have no concern with the moment of inertia.
    Table of Content 1 Introduction 1
    2 Apparatus and Measurement 12
    2.1 Experimental Setup . . . . . . . . . . . . . . . . . . . . . . . . . . 12
    2.2 Rotation Frequency Measurement . . . . . . . . . . . . . . . . . . . . 13
    2.3 Flow Velocity Measurement . . . . . . . . . . . . . . . . . . . . . . . 15
    3 Result and Analysis 20
    3.1 The evolution of a Rod in Vertically ‡owing Soap Film . . . . . . . . 20
    3.2 The critical points of rotating and ‡uttering . . . . . . . . . . . . 25
    3.3 The dimensionless parameter number(P) . . . . . . . . . . . . . . . . 30
    3.4 The frequency of critical rotating points . . . . . . . . . . . . . . 31
    4 Conclusion 33
    Reference [1] H. Kellay, X-l. Wu, and W. I. Goldburg, Phys. Rev. L 74, 3975 (1995).
    [2] M. A. Rutgers, X. L. Wu, and W. B. Daniel, Rev. Sci. Instrum. 72, 3025(2001)
    [3] Jun Zhang, Stephen Childress, Albert Libchaber, and Michael Shelley, Nature
    408, 835(2000)
    [4] Silas Alben, Michael Shelley, and Jun Zhang, Nature 420, 479(2002)
    [5] V. K. Horvath, J. R. Cressman, W. I. Goldburg, and X. L. Wu, Phys. Rev. E
    61, R4702(2000)
    [6] D. J. Acheson, Elementary Fluid Dynamics. (Clarendon Press, Oxford, 1990)
    [7] Peter Vorobie¤, and Robert E. Ecke, Phys. Rev. E 60, 2953(1999)
    Advisor
  • Peilong Chen(³¯°ö«G)
  • Files
  • 92222003.pdf
  • approve immediately
    Date of Submission 2005-07-20

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