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Yehui Zhu, Liquan Xie, Tsunming Wong and Tsung-Chow Su
The three-dimensional scour beneath a partially-buried pipeline in regular waves was visualized using a miniature camera installed in a transparent pipeline. The scour mechanism was analyzed based on the results. Scour development was observed to start a...
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Michael Thome, Ould el Moctar and Thomas E. Schellin
Comparative hydrodynamic loads caused by a focused wave acting on differently sized slender vertical cylinders placed in a wave canal were predicted at model scale using an unsteady Reynolds-averaged Navier?Stokes (URANS) solver and the Morison equation....
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Ruigeng Hu, Xiuhai Wang, Hongjun Liu and Da Chen
In this study, the local scour around tripods in random waves is numerically investigated. The seabed-tripod-fluid numerical model with an RNG k-e turbulence model is built and validated. Following that, the scour characteristics and flow velocity distri...
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Erfan Taheri, Ming Zhao and Helen Wu
The response of an elastically mounted circular cylinder vibrating in an oscillatory flow oblique to the flow direction is investigated. Simulations are conducted for vibration angles ranging from 0° to 90°, with 0° and 90° corresponding to the cases whe...
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Rebekka Gieschen, Christian Schwartpaul, Jannis Landmann, Lukas Fröhling, Arndt Hildebrandt and Nils Goseberg
The rapid growth of marine aquaculture around the world accentuates issues of sustainability and environmental impacts of large-scale farming systems. One potential mitigation strategy is to relocate to more energetic offshore locations. However, researc...
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Jun Huang, Guang Yin, Muk Chen Ong, Dag Myrhaug and Xu Jia
The present study carries out two-dimensional numerical simulations to investigate scour beneath a single pipeline and piggyback pipelines subjected to an oscillatory flow condition at a Keulegan?Carpenter (????
K
C
) number of 11 using SedFoam (an open-...
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Krish Thiagarajan and Javier Moreno
The research problem discussed in this paper is of relevance to floating offshore wind turbine design, where heave plates are attached to the columns of a semi-submersible in order to improve vertical plane stability and the power output. Because of the ...
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Minghao Wu, Leen De Vos, Carlos Emilio Arboleda Chavez, Vasiliki Stratigaki, Tiago Fazeres-Ferradosa, Paulo Rosa-Santos, Francisco Taveira-Pinto and Peter Troch
This paper presents a series of large-scale wave flume experiments on the scour protection damage around a monopile under combined waves and current conditions with model scales of 1:16.67 and 1:8.33. The main objective is to compare the damage data obta...
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Anders Wedel Nielsen and Thor Ugelvig Petersen
The stability of scour protections is, potentially, an important issue during the design of fixed foundations for offshore wind turbines. One of the failure mechanisms observed at placed scour protection around offshore foundations is suction of sediment...
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