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    题名: Propagation of solitary waves over double submerged barriers
    作者: Yun-Ta Wu, Shih-Chun Hsiao
    关键词: solitary wave;submerged breakwater;solid/slotted barriers;reflection;transmission;dissipation;experiment;RANS model
    日期: 2017-11-26
    上传时间: 2018-11-08 12:12:12 (UTC+8)
    摘要: Protection of nearshore area by means of artificial structure is an important issue for
    coastal engineering community. In this study, we aim to investigate wave hydrodynamics and
    hydrodynamic performance due to solitary waves interacting with double submerged barriers.
    Double barriers, put bottom-mounted vertically on the flat seafloor and also paralleled to each other,
    are considered as a wave absorber. New experiments are carried out to provide measured data for
    model validation. Numerical simulations are performed using a depth- and phase-resolving model,
    based on the Reynolds-Averaged Navier–Stokes equations with a non-linear k-
    ɛ turbulence closure
    model. Model–data comparisons show good agreements in terms of free surface fluctuations in time
    histories and error analyses are performed. Numerical results are then used to study the variations
    of the free surface motions of breaking waves and the flow fields. In particular, the model results
    reveal that the optimal horizontal distance, judged as minimum wave transmission, between two
    submerged barriers is approximately 2.5 times the still water depth for present wave conditions and
    obstacle geometries. Furthermore, numerical model is extended to evaluate the functional efficiency
    of a dual-slotted-barrier system with different obstacle configurations under various conditions of
    solitary waves by means of energy reflection, transmission and dissipation coefficients.
    關聯: Water, 9(12), p.917
    DOI: doi.org/10.3390/w9120917
    显示于类别:[水資源及環境工程學系暨研究所] 期刊論文

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