Article
Engineering, Multidisciplinary
Jin Xu, Jihong Xia, Lingling Wang, Eldad J. Avital, Hai Zhu, Yin Wang
Summary: An improved Eulerian method with a novel morphologic model is developed to study local scour. The method accurately captures the local scour and agrees with experimental results. The results also highlight the importance of Reynolds stress in erosion at the leading edge of the cylinder.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Engineering, Marine
Liu Ming-Ming, Wang Hao-Cheng, Shao Fei-Fei, Jin Xin, Tang Guo-Qiang, Yang Fan
Summary: This paper presents a developed two-dimensional finite element numerical model to predict local scour around a vibration submarine pipeline under free surface wave condition. The model considers both suspended load and bed load sediment transportations and uses the Arbitrary Lagrangian-Eulerian method to track the moving boundaries. The results show that vibration leads to deeper scour depth and wider scour scope around the pipeline.
Article
Engineering, Marine
Dongfang Liang, Jie Huang, Jingxin Zhang, Shujing Shi, Nichenggong Zhu, Jun Chen
Summary: In recent years, there have been numerous numerical studies on scour around offshore pipelines, primarily focusing on two-dimensional setups. This study introduces a numerical tool based on the Ansys FLUENT flow solver to investigate three-dimensional scour around finite length pipelines. The model's accuracy is validated against measurements of both two-dimensional scour around a long pipe and three-dimensional scour around a sphere. Subsequent computations reveal the relationship between scour depth and pipeline length.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Review
Engineering, Civil
Yong G. Lai, Xiaofeng Liu, Fabian A. Bombardelli, Yalan Song
Summary: This article reviews the basic theory and current state of 3D local scour models, focusing on sediment solvers, and discusses future research needs.
JOURNAL OF HYDRAULIC ENGINEERING
(2022)
Article
Engineering, Civil
Titi Sui, Leon Heine Staunstrup, Stefan Carstensen, David R. Fuhrman
Summary: New experiments present a rational model for predicting the span migration velocity beneath submerged horizontal pipelines, incorporating dimensional analysis and physical insight. The model can quantitatively predict major features of span migration velocity in the early stages of scour induced by perpendicular flow.
COASTAL ENGINEERING
(2021)
Article
Mechanics
Yangyang Gao, Haojun Yang, Lizhong Wang, Ming Zhao
Summary: In this paper, three-dimensional numerical simulations are conducted to study the flow characteristics of a non-submerged diversion dike. The results show that the blockage ratio plays a crucial role in the momentum redistribution and turbulent kinetic energy of the dike, while the Froude number has little effect on the flow field.
Article
Computer Science, Interdisciplinary Applications
Huihuan Ma, Shuye Zhang, Boen Li
Summary: Local scour poses a major threat to the safety of offshore group piles. Conventional simulation methods neglect microscopic sediment behavior, while the CFD-DEM method combines with coarse grain method and porous media model to improve simulation efficiency. The study reveals the key mechanisms of local scour around twin piles under different arrangements.
COMPUTERS AND GEOTECHNICS
(2023)
Review
Engineering, Marine
Ming Zhao
Summary: This paper reviews the recent development of numerical modelling for local scour around hydraulic and marine structures, including the classification of models and their respective characteristics. Sediment transport rate models are the most commonly used, while the CFD-DEM model allows for a detailed study of particle interactions. Challenges remain in the field of local scour, calling for further research.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
Fuzhen Chen, Hong Yan
Summary: A new constitutive model describing the movement of dense granular media is established in this study, combining elastic and viscoplastic models to describe solid and liquid phases. The theoretical model and numerical method are validated through basic calculation tests and shown to have important practical value for applications such as material processing, 3D printing, and mineral mining.
Article
Engineering, Civil
Mohammad Reza Namaee, Jueyi Sui, Yongsheng Wu, Natalie Linklater
Summary: This study compared 3D numerical models to laboratory experiments to examine local scour around bridge piers with and without smooth and rough ice cover. The sediment transport model was validated using the equation of Meyer-Peter and Muller, showing good agreements with experimental observations under rough ice cover conditions where maximum scour depth and turbulent kinetic energy were the highest around bridge piers.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Yalan Song, Yuncheng Xu, Hassan Ismail, Xiaofeng Liu
Summary: This paper introduces a new three-dimensional scour model, ibScourFoam, based on an immersed boundary method, capable of handling scour around complex structures. A special wall function was developed to address the non-smoothness problem of wall shear stress in previous methods, ensuring accurate simulation of scour processes. The model was validated against literature cases and a flume experiment, successfully capturing the distinct stages of scour and the complex process of undermining and exposing buried structures.
COASTAL ENGINEERING
(2022)
Article
Engineering, Marine
Ming-ming Liu, Hao-cheng Wang, Guo-qiang Tang, Fei-fei Shao, Xin Jin
Summary: The study numerically investigates local scour around two vertical piles using a three-dimensional finite element solver. The numerical model is validated through comparison with published data and experimental tests, demonstrating its effectiveness in predicting velocity and scour around piles. The study also explores the impact of gap ratio on scour depth at the upstream side of the piles and investigates the time scale of scour under various gap ratios.
Article
Engineering, Aerospace
Xiangyu Meng, Hui Tian, Ruipeng Yu, Yudong Lu, Xiaoming Gu, Guang Tan, Guobiao Cai
Summary: In this study, a three-dimensional dynamic numerical model was established to investigate hybrid rocket motors. The model was verified through ground experiments, and the results showed good agreement between the simulation and experiment. This method can accurately predict the regression of complex-shaped grains and guide the design of the motor.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Marine
Ruigeng Hu, Xiuhai Wang, Hongjun Liu, Da Chen
Summary: This study numerically investigates the local scour around tripods in random waves and proposes a revised stochastic model for predicting the equilibrium scour depth. The results show that the numerical model accurately captures the scour process and flow field around tripods, and the revised stochastic model agrees well with the numerical and experimental results.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Marine
Yehui Zhu, Liquan Xie, Tsunming Wong, Tsung-Chow Su
Summary: This study visualized the three-dimensional scour under a partially-buried pipeline using a miniature camera and analyzed the scour mechanism. The results showed that scour development started at the upstream edge of the span shoulder, and a new scour front formed due to the deflected flow entering the scour hole. The scour propagation rate was found to be related to the pipeline embedment ratio and the KC number.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Water Resources
Hao Luo, Dimitrios K. Fytanidis, Arthur R. Schmidt, Marcelo H. Garcia
ADVANCES IN WATER RESOURCES
(2018)
Article
Environmental Sciences
Zhenduo Zhu, David M. Waterman, Marcelo H. Garcia
ENVIRONMENTAL FLUID MECHANICS
(2018)
Review
Engineering, Civil
Som Dutta, Marcelo H. Garcia
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Editorial Material
Engineering, Civil
Som Dutta, Marcelo H. Garcia
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Review
Engineering, Civil
Som Dutta, Marcelo H. Garcia
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Editorial Material
Engineering, Civil
Som Dutta, Marcelo H. Garcia
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Article
Computer Science, Interdisciplinary Applications
Zhenduo Zhu, Jessica Zinger LeRoy, Bruce L. Rhoads, Marcelo H. Garcia
COMPUTERS & GEOSCIENCES
(2018)
Article
Engineering, Civil
Roberto Fernandez, Marcelo H. Garcia, Gary Parker
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Article
Engineering, Environmental
Lori Jones, Marcelo H. Garcia
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2018)
Article
Physics, Fluids & Plasmas
Heng Wu, Carlo C. Zuniga Zamalloa, Blake J. Landry, Marcelo H. Garcia
PHYSICAL REVIEW FLUIDS
(2019)
Article
Engineering, Civil
David M. Waterman, Marcelo H. Garcia
JOURNAL OF HYDRAULIC ENGINEERING
(2019)
Article
Engineering, Civil
Gerald E. Galloway, Giovanni Seminara, Guenter Bloeschl, Marcelo H. Garcia, Alberto Montanari, Luca Solari
JOURNAL OF HYDRAULIC ENGINEERING
(2020)
Article
Engineering, Civil
Roberto Fernandez, Alejandro J. Vitale, Gary Parker, Marcelo H. Garcia
Summary: The experimental analysis showed that hydraulic resistance in a mixed bedrock-alluvial channel changes with the degree of alluviation, with greater resistance for bare-bedrock conditions but decreasing as sediment supply increases. Bedforms may lead to increased resistance due to form drag, and fluctuations in alluvial cover can result in instantaneous changes in hydraulic resistance.
JOURNAL OF HYDRAULIC RESEARCH
(2021)
Article
Geography, Physical
Taylor Rowley, Kory Konsoer, Eddy J. Langendoen, Zhi Li, Mick Ursic, Marcelo H. Garcia
Summary: This study analyzes the morphology of twelve point bars in the Pearl and Wabash rivers, revealing differences between the two river reaches in terms of channel curvature, migration rates, and bend migration modes. Additionally, distinct transverse bar profile distributions were observed along the bars in each reach. The synthetic morphologic data generated using a curvature-driven model showed reasonable agreement with field observations, with differences attributed to natural river system variability not captured by the model.
Article
Engineering, Civil
Erica Diaz, Marcelo Garcia, Andres Rodriguez, Oscar Dolling, Santiago Ochoa, Juan Bertoni
TECNOLOGIA Y CIENCIAS DEL AGUA
(2018)