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 ¡Vflow 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¡BChen¡]2006¡^¡CThe 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¡BChen(2006) has the similar
results as well.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0829108-070117 |
| Date | 29 August 2008 |
| Creators | Lee, Cheng-Ta |
| Contributors | Hung-Chu Hsu, Guan-Yu Chen, Yang-Yih Chen, Yung-Fang Chiu, Chung-Pan Lee |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0829108-070117 |
| Rights | unrestricted, Copyright information available at source archive |
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