Interaction of non-breaking regular waves with a periodic array of artificial porous bars

Twu, Sheng-Wen; Liu, Cheng-Chi

doi:10.1016/j.coastaleng.2004.01.002

Cited by 23 publications

(4 citation statements)

References 15 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And besides, the permeable breakwater allows water circulation, retains water quality and thus protects the coastal environment. In practices, there are two main forms of vertical permeable structures: (1) single or several vertical permeable plates [Yu, 1995;Isaacson et al, 1998Isaacson et al, , 1999McIver, 1999;Twu and Liu, 2004], (2) a solid back wall with single or several vertical permeable plates in front [Jarlan, 1961;Kondo, 1979;Tanimoto and Yoshimoto, 1982;Zhu and Chwang, 2001a]. Moreover, in the laboratories, a finite number of porous plates can be placed at the bottom of a wave tank to absorb waves [Twu and Lin, 1991;Losada et al, 1993].…”

Section: Introductionmentioning

confidence: 99%

Porous Effect Parameter of Thin Permeable Plates

Liu

Teng

2006

Coastal Engineering Journal

120

View full text Add to dashboard Cite

The present paper aims at getting the porous effect parameter G of a thin permeable wall. The reflection and transmission coefficients of a thin vertical porous wall with different porous shapes and porosities are obtained by a physical model experiment. The reflection coefficient and total horizontal wave load on a perforated caisson are also obtained by another experiment. Analytical solutions of wave interaction with these two vertical porous breakwaters are introduced. The reflection and transmission coefficients between predictions and experimental results of authors' and four other researchers' are compared. By comparisons, the estimate methods of the linearized resistance coefficient f and the inertial effect coefficient s of the permeable plate are recommended. Following the formula of Yu [1995], the values of G are calculated by f and s. A complete estimate method of porous effect parameter G is presented, which consists of the formula of Yu [1995] and the present experimental formula. The estimate method of G is validated by comparing * Corresponding author. 309 Coast. Eng. J. 2006.48:309-336. Downloaded from www.worldscientific.com by UNIVERSITY OF CALIFORNIA @ SAN DIEGO on 01/03/15. For personal use only. 310 Y. Li, Y. Liu & B. Teng the predicted values of the total horizontal wave loads on the perforated caisson with the experimental results.

show abstract

Section: Introductionmentioning

confidence: 99%

Porous Effect Parameter of Thin Permeable Plates

Liu

Teng

2006

Coastal Engineering Journal

120

View full text Add to dashboard Cite

show abstract

“…A submerged permeable breakwater has the advantage of low cost and can dissipate more wave energy through the viscosity in the permeable medium [42,43]. Many researchers carried out a large number of theoretical analyses [38], experimental works [37,44], and numerical simulations [45][46][47][48] to investigate the hydrodynamic performance of submerged permeable breakwaters under the impact of different types of incident waves, e.g., a solitary wave [49], regular waves [50,51], and irregular waves [52]. As early as the 1970s, Dattatri et al [53] studied the influences of porosity on the wave transformation of the submerged permeable breakwaters by conducting experiments.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Hydrodynamics of Submerged Permeable Breakwater under Impacts of Focused Wave Groups Using a Nonhydrostatic Wave Model

Huang

Guo

et al. 2022

JMSE

View full text Add to dashboard Cite

Extreme waves, called rogue waves or freak waves, usually occur unexpectedly and with very large wave heights. In recent years, extreme waves were reported not only in deep ocean waters but also in shallow waters, which threaten the safety and intactness of the coastal regions. To prevent the coastal infrastructures and communities from the devastating power of extreme surges and waves, many coastal defense structures were built along the coastline, i.e., submerged permeable breakwaters. However, the number of studies on the hydrodynamic characteristics of a submerged permeable breakwater under the impact of extreme waves is relatively few. In addition, wave focusing has been widely used to generate extreme waves in the past few decades. Hence, as a necessary supplement to the previous research work, the hydrodynamic performance of a submerged permeable breakwater under the impacts of focused wave groups was numerically studied by using a nonhydrostatic numerical wave model (NHWAVE). The influences of several main factors, such as the incident significant wave height, water depth, wave peak period, porosity of the breakwater (n), and the side slope angle of the breakwater, were considered. It is expected that the results of this study will further strengthen the research on the hydrodynamic characteristics of a submerged permeable breakwater under extreme wave conditions.

show abstract

“…Briganti et al (2003) studied the impact of the transmission coefficient on the transfer of energy from lower to higher harmonics and analyzed the evolution of wave spectrum shape preliminarily. Twu and Liu (2004) set up an analytical computational model to study the effects of porosity, number, width and height of bars on wave damping characteristics. They found that Bragg reflection generated by permeable bars is smaller than that generated by impermeable bars.…”

Section: Introductionmentioning

confidence: 99%