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Li Zhang, Pengtao Wang, Wenhai Yang, Weiguang Zuo, Xinhong Gu and Xiaoxiao Yang
Factors such as flow and sediment characteristics affecting the spur dike?s local depth of erosion have yielded considerable research results, but there is little discussion of the geometry of the spur dike?s local scour holes. This study focuses on the ...
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Songyang Wang, Jianjun Ma, Chaosheng Wang, Fengjun Liu and Da Li
The scouring effect is widely acknowledged as a primary contributor to the weakening in the bearing performance of offshore piles; it often results in asymmetric scour patterns around the pile. To meticulously examine the impact of three-dimensional asym...
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Lav Kumar Gupta, Manish Pandey, P. Anand Raj and Jaan H. Pu
Scouring around the bridge pier is a natural and complex phenomenon that results in bridge failure. Failure of bridges have potential devastation and public safety and economic loss, which lead to political consequences and environmental impacts. Therefo...
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Thi Hoang Thao Nguyen, Sungwon Park, Dongmin Jang and Jungkyu Ahn
The main goal of this study was comparing the performance of an open-source code OpenFOAM and a commercial software Ansys Fluent in simulating the turbulent flow through a scour hole developed in a sand bed channel, which helps to give a hint in choosing...
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Ainal Hoque Gazi, Subhrangshu Purkayastha and Mohammad Saud Afzal
In this paper, a mathematical equation is developed for the equilibrium scour depth considering an arbitrary shape of the scour hole around a pier under the action of collinear waves and current. A power-law current velocity profile is assumed for the pu...
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Yilin Yang, Meilan Qi, Jinzhao Li and Xiaodong Ma
This study concerns the evolution of flow field and hydrodynamic characteristics within the developing scour hole around a four-pile group with 2 × 2 arrangement. The instantaneous velocities in scour holes at four typical stages during the scouring proc...
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Thi Hoang Thao Nguyen, Jungkyu Ahn and Sung Won Park
Local scour occurs around hydraulic structures such as piers, bed protections, and dikes. In this study, the turbulent flow around a scour hole downstream of a fixed bed protection was investigated. Numerical modeling with OpenFOAM was applied to compute...
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Irfan Abid, Terry W. Sturm and Seung Ho Hong
Bridge abutment scour is a complex phenomenon, which significantly affects bridge stability and is responsible for the damage and failures of many bridges over waterways across the world. Given the widespread and devastating human and societal costs, num...
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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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Liquan Xie, Yehui Zhu and Tsung-Chow Su
The intersection of the span shoulder and the scour hole under a pipeline, also called the scour front, can affect the scour hole extension rate and the bearing capacity of the span shoulder, which is associated with pipeline spanning and failure. Studie...
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Fei Fan, Bingchen Liang, Yaru Li, Yuchuan Bai, Yanjun Zhu, Zhixia Zhu
Pág. 1 - 23
Rigid-lid approximation is usually used to replace the free surface in scour simulation. The influence of the rigid lid assumption on the prediction precision of scour hole in steady flow is studied in this paper. Firstly, a local scour model was constru...
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Cheng-Kai Chang, Jau-Yau Lu, Shi-Yan Lu, Zhong-Xiang Wang and Dong-Sin Shih
This study discusses the mechanism for the occurrence of equilibrium and non-equilibrium scour holes. By using a particle image velocimetry (PIV) measurement system, it measures the turbulent flow fields in an open channel moving through the rough bed be...
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Thi Hoang Thao Nguyen, Jungkyu Ahn and Sung Won Park
Local scour occurs around hydraulic structures such as piers, bed protections, and dikes. In this study, the turbulent flow around a scour hole downstream of a fixed bed protection was investigated. Numerical modeling with OpenFOAM was applied to compute...
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Su-Chin Chen, Samkele Tfwala, Tsung-Yuan Wu, Hsun-Chuan Chan and Hsien-Ter Chou
A new type of collar, the hooked-collar, was studied through experiments and numerical methods. Tests were conducted using a hooked collar of a width of 1.25b and a height of 0.25b, where b is the bridge-pier width. The hooked-collar efficiency was evalu...
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Miguel Uh Zapata, Damien Pham Van Bang and Kim Dan Nguyen
The numerical modeling of sediment transport under wave impact is challenging because of the complex nature of the triple wave?structure?sediment interaction. This study presents three-dimensional numerical modeling of sediment scouring due to non-breaki...
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Ali A. Yousif, Sadeq Oleiwi Sulaiman, Lamine Diop, Mohammad Ehteram, Shamsuddin Shahid, Nadhir Al-Ansari and Zaher Mundher Yaseen
The determination of scour characteristics in the downstream of sluice gate is highly important for designing and protection of hydraulic structure. The applicability of modern data-intelligence technique known as extreme learning machine (ELM) to simula...
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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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Badal Mahalder, John S. Schwartz, Angelica M. Palomino and Jon Zirkle
The jet test device has been predominantly used for in situ critical shear stress (tc) and erodibility coefficient (kd) measurements of cohesive streambanks/beds using three analytical procedures: the Blaisdell method (BM), the iterative approach (IP), a...
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Badal Mahalder, John S. Schwartz, Angelica M. Palomino and Jon Zirkle
The jet test device has been predominantly used for in situ critical shear stress (tc) and erodibility coefficient (kd) measurements of cohesive streambanks/beds using three analytical procedures: the Blaisdell method (BM), the iterative approach (IP), a...
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Pol Bouratsis, Panayiotis Diplas, Clinton L. Dancey, Nikolaos Apsilidis
Pág. 1 - 17
The measurement of the morphologic characteristics of evolving sediment beds around hydraulic structures is crucial for the understanding of the physical processes that drive scour. Although there has been significant progress towards the experimental ch...
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