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Lalit Kumar and Mohammad Saud Afzal
The present study employs numerical simulations to investigate vertical wall abutment scour with different aspect ratios (B/L, where B is the abutment length in the flow direction, and L is the abutment length transverse to the flow direction) under the ...
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Ke Hu, Xinglan Bai and Murilo A. Vaz
To investigate the different influencing characteristics of local scour around submarine pipelines, hydrodynamic and sediment transport two-dimensional models based on Flow-3D are used to numerically simulate the local scour around the pipeline under ste...
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HtayHtay Aung, Beniamino Onorati, Giuseppe Oliveto and Guoliang Yu
Spur dikes are elongated structures extending from banks into rivers that mitigate erosion by forcing the flow away from the bank. The research on grouped spur dikes is insufficient in comparison with those on isolated spur dikes. Most of the studies foc...
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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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Fan Zhang, Zhipeng Zang, Ming Zhao, Jinfeng Zhang, Botao Xie and Xing Zou
When a pipeline is laid on the seabed, local scour often occurs below it due to sea currents. In practical engineering, there are some cases that two pipelines laid on the seabed need to cross with each other. The complex flow structures around two cross...
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Ruigeng Hu, Xiuhai Wang, Hongjun Liu, Hao Leng and Yao Lu
Local scour around a submarine piggyback pipeline in combined waves and current is investigated experimentally. Based on the experimental results, the scour evolution and scour morphology are firstly analyzed. Then, a comparison with the equilibrium scou...
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Ming Zhao
This paper reviews the recent development of numerical modelling of local scour around hydraulic and marine structures. The numerical models for simulating local scour are classified into five categories: sediment transport rate models, two-phase models,...
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Dongfang Liang, Jie Huang, Jingxin Zhang, Shujing Shi, Nichenggong Zhu and Jun Chen
In the past few decades, there have been many numerical studies on the scour around offshore pipelines, most of which concern two-dimensional setups, with the pipeline infinitely long and the flow perpendicular to the pipeline. Based on the Ansys FLUENT ...
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Ruigeng Hu, Hongjun Liu, Hao Leng, Peng Yu and Xiuhai Wang
A series of numerical simulation were conducted to study the local scour around umbrella suction anchor foundation (USAF) under random waves. In this study, the validation was carried out firstly to verify the accuracy of the present model. Furthermore, ...
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Dag Myrhaug and Muk Chen Ong
This article derives the time scale of pipeline scour caused by 2D (long-crested) and 3D (short-crested) nonlinear irregular waves and current for wave-dominant flow. The motivation is to provide a simple engineering tool suitable to use when assessing t...
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