Wave interaction with a concentric porous cylinder system

Wang, Keh‐Han; Ren, Xugui

doi:10.1016/0029-8018(94)90009-4

Cited by 89 publications

(30 citation statements)

References 5 publications

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“…6 and 7. Comparisons of the present method withWang and Ren's (1994) theoretical curves for a/b=0.2, 0.5 and 0.8 show a similar tendency.…”

supporting

confidence: 80%

“…The wave run-up at the stagnation point of an impermeable cylinder with the effects of flume walls is always larger than that of a perforated cylinder with the effects of flume walls. Wang and Ren (1994) utilized a constant water depth d=15 m and an incident wave height H=1 m in their theoretical calculations. The radius of the perforated cylinder b was chosen as 10 m and the ratio of the radii of both cylinders, a/b, was used to examine the effect of the annular spacing between the cylinders on the wave run-up at the surfaces of the cylinders.…”

Section: Verification Of the Proposed Formulationmentioning

confidence: 99%

“…The evaluation of G requires an iterative procedure ( Isaacsson et al,1998). Previous researchers have mainly used Chwang and Li's model (Wang and Ren, 1994;Vijayalakshmi et al, 2008;Sankarbabu et al, 2007Sankarbabu et al, , 2008Song and Tao, 2008). Teng and Han (2000), Li et al (2003) and Zhu (2002) utilized Yu's model in which G is presented as a complex constant number.…”

Section: Introductionmentioning

confidence: 99%

“…At present, there have been few studies dealing with regular wave interaction with thin-walled porous cylindrical structures. Wang and Ren (1994) were the first to undertake a theoretical study of regular wave interaction with a concentric perforated cylinder. Darwiche et al (1994) derived analytical expressions for wave motions at the interior and exterior of a semiporous circular caisson encircling a vertical impermeable cylinder.…”

Section: Introductionmentioning

confidence: 99%

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Wave run-up on a coaxial perforated circular cylinder

Zhu

2011

China Ocean Eng

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This paper describes a plane regular wave interaction with a combined cylinder which consists of a solid inner column and a coaxial perforated outer cylinder. The outer perforated surface is a thin porous cylinder with an annular gap between it and the inner cylinder. The non-linear boundary condition at the perforated wall is a prime focus in the study; energy dissipation at the perforated wall occurs through the resistance to the fluid across the perforated wall. Explicit analytical formulae are presented to calculate the wave run-up on the outer and inner surfaces of the perforated cylinder and the surface of the inner column. The theoretical results of the wave run-up are compared with previous experimental data. Numerical results have also been obtained: when the ratio of the annular gap between the two cylinders to incident wavelength (b−a)/L≤0.1, the wave run-up on the inner surface of the perforated cylinder and the surface of inner column can partially or completely exceed the incident wave height.

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“…6 and 7. Comparisons of the present method withWang and Ren's (1994) theoretical curves for a/b=0.2, 0.5 and 0.8 show a similar tendency.…”

supporting

confidence: 80%

Section: Verification Of the Proposed Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wave run-up on a coaxial perforated circular cylinder

Zhu

2011

China Ocean Eng

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“…Williams and Li [20] studied the analytical studies conducted on the wave kinematics around an impermeable pile encompassed with the porous outer cylinder highlighted the factors that influence the water particle kinematics around the perforated region. Wang and Ren [19] demonstrated the fact that for the decreased annular spacing between the solid cylinder and the encompassed outer perforated cover, long waves impose larger forces on the inner cylinder than that of the short waves. Williams and Li [21] studied the perforation ratio of the structure resulted in a significant reduction in both the hydrodynamic loads experienced by the cylinders and the associated wave run-up.…”

Section: Introductionmentioning

confidence: 98%

Flow field around outer perforated circular cylinder under regular waves: numerical study

Chandrasekaran

Madhavi

2015

Mar Syst Ocean Technol

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Offshore structures are often subjected to critical environmental loads that cause serious damage; MARS TLP in Gulf of Mexico damaged by hurricane Katrina in 2005 is an example. Existence of external perforated cover reduces hydrodynamic forces on the existing members caused by direct wave impact. The quantification of the force reduction in the offshore structures is reported by many researchers by emphasizing the fact that there is reduction in force on the existing member due to the presence of outer perforated cover. From the existing literature, the annular spacing and the perforation ratio are taken as 0.5 and 11 %. Velocity profile in the cylinder and around the perforation is investigated to give a better understanding of the physics for the considered case. Variation of velocity is also studied along the depth of cylinder and also in the perforation zone to get the clear understanding of the physics using the computational fluid dynamics tool STAR-CCM? for various areas of perforation for different wave steepness (H/L).

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Variations of Water Particle Kinematics of Offshore TLPS with Perforated Members: Numerical Investigations

Chandrasekaran

Madhavi

2014

Advances in Structural Engineering

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Wave interaction with a concentric porous cylinder system

Cited by 89 publications

References 5 publications

Wave run-up on a coaxial perforated circular cylinder

Wave run-up on a coaxial perforated circular cylinder

Flow field around outer perforated circular cylinder under regular waves: numerical study

Variations of Water Particle Kinematics of Offshore TLPS with Perforated Members: Numerical Investigations

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