Title page for etd-0829108-070117


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URN etd-0829108-070117
Author Cheng-Ta Lee
Author's Email Address m955040003@student.nsysu.edu.tw
Statistics This thesis had been viewed 5573 times. Download 1274 times.
Department Marine Environment and Engineering
Year 2007
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Experimental study of the particle’s motion characteristics for wave-current interactions
Date of Defense 2008-07-29
Page Count 177
Keyword
  • mass transport
  • wave-current interaction
  • Lagrangian
  • particle trajectory
  • Abstract There is a long terms of developement for academics theoretical analyzing and
    experimental researching by using the Lagrangian method. But for such trajectory
    experimentalists still have interference with reflected waves because of the length of
    the water tank is too short or the diameter and the density of the simulate particle , in
    spite of measuring the trajectory of the fluid particle have done. For there is no quite
    completed quantification data for the trajectory of fluid particle, this study is aiming at
    researching the truly movement of the flow field under wave-current interaction by
    trajectory measuring.
    This research choosing the simulate particle’s diameter for 1 mm , collocating
    with a high-speed vedio camera to record the particle’s moving characteristics while
    the wave-current interaction occured, to proceed a series of qualitative and
    quantitative testing. And to comple with all these data and improve the modification
    by using Image Processing to derive and orientate the coordinates .
    According to the experimental results of the flow field,it has proved that mass
    transport occured at the same-depth and no-flow condition through the wave
    progressing direction.The trajectory of the fluid particle of wave-current interaction
    in co-flow , its curve presenting the cross-convolution increasing and even presenting
    the cuspidal locus. And the trajectory of the fluid particle of wave-current interaction
    in inverse –flow is opposite to the trajectory of the no-flow movement. The results of
    the experiment is quite accord with to the 3rd order the theoretical analyzing of Chen
    (1994)and Shu、Chen(2006)。The fluid particle reproducting the moving period
    of the high-elevation is greater than the wave’s and increasing by the sharpness of the
    wave.
    The mass transport velocity is the same theory results ,and decreased deviation
    of artificiality in estimating particle position.
    According to the ratio of the experimental results, root mean square of error Ex
    and total mass transport displacement. The experimental results compared to the
    theoretical results obtained by Chen (1994)and Hsu、Chen(2006) has the similar
    results as well.
    Advisory Committee
  • Chung-Pan Lee - chair
  • Hung-Chu Hsu - co-chair
  • Yung-Fang Chiu - co-chair
  • Guan-Yu Chen - advisor
  • Yang-Yih Chen - advisor
  • Files
  • etd-0829108-070117.pdf
  • indicate access worldwide
    Date of Submission 2008-08-29

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