Article
Engineering, Marine
I-Fan Tseng, Chih-Hung Hsu, Po-Hung Yeh, Ting-Chieh Lin
Summary: This study investigates the seabed scour mechanism near Mailiao Port through data analysis, model tests, and numerical simulations. The results show that the current plays a significant role in the scour process, and specific scour mechanisms are identified.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Mechanical
O. A. Zambrano, Jiaren (Jimmy) Jiang
Summary: This study investigates the impact of vanadium carbide (VC) content and bulk hardness on the erosion resistance of tool steels. Five grades of CPM xV tool steels were tested using a Coriolis erosion tester with a silica sand slurry. The results show that higher VC volume fractions lead to greater erosion resistance, while material hardness has minimal effect. Microscopic analysis reveals that VC carbides significantly enhance wear protection, with the effect becoming more pronounced at higher VC volume fractions.
Article
Engineering, Ocean
Hui Li, Xu Qiu, Shu Yan, Hao Zhao, Wenguan Ma
Summary: By establishing a three-dimensional numerical model and conducting numerical simulations, the local scouring of a large-diameter monopile foundation for offshore wind power is studied. The results show that the novel spoiler structure can significantly reduce the strength of the horseshoe vortex and regional shear stress. The spoiler exhibits three flow mechanisms under different geometric structures and shows promising results for local erosion protection.
APPLIED OCEAN RESEARCH
(2023)
Article
Engineering, Marine
Qishun Li, Yanpeng Hao, Peng Zhang, Haotian Tan, Wanxing Tian, Linhao Chen, Lin Yang
Summary: In this study, a three-dimensional computational fluid dynamics simulation model using FLOW-3D is developed to investigate the scouring process of semi-exposed submarine cables. The effects of sediment critical Shields number, sediment density, and ocean current velocity on local scouring are discussed. The results indicate that three scouring holes are formed around the submarine cables, and the development of these holes leads to cable spanning. The spanning time has a cubic relationship with sediment's critical Shields number, a linear relationship with sediment density, and an exponential relationship with ocean current velocity.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Mingchao Du, Zengliang Li, Long Feng, Xiangwei Dong, Jiaqi Che, Yanwen Zhang
Summary: A numerical model was established to investigate particle fracture and metal surface erosion, showing that the interaction of different materials under different conditions can have an impact on fracture and damage.
Article
Environmental Sciences
Jian Luo, Zicheng Zheng, Tingxuan Li, Shuqin He, Xizhou Zhang, Huagang Huang, Yongdong Wang
Summary: The study found that with the increase in upslope filling area, the minimum values of soil surface elevation also increased. As rill erosion developed, the soil surface microtopography tended to sharpen and the relative elevation changed greatly. Furthermore, runoff and soil loss gradually decreased with the increase in upslope filling area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Thermodynamics
Yujiao Zhang, Yinghao Li, Yinling Zhang, Ran Zong
Summary: In this study, a three-dimensional model including droplet and molten pool was established to investigate the multi-coupling transport phenomena in TIG-MIG hybrid arc welding. An innovative distribution pattern of arc heat and force that adapted to the evolution of molten pool surface was proposed. The effect of TIG arc on molten pool behavior and undercut defect was analyzed, and the results showed that the TIG-MIG hybrid arc eliminated undercut by reducing the inertia force and enhancing the hydrostatic pressure.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Energy & Fuels
Carlo Callari, Johannes C. Pol
Summary: This paper presents the numerical interpretation of a recent experiment on a real-scale levee physical model, investigating the process of Backward Erosion Piping (BEP) and validating a finite element formulation capable of modeling both the simultaneous processes observed in backward erosion piping and the time-dependent effects.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Marine
Jiale Li, Jijian Lian, Yaohua Guo, Haijun Wang, Xu Yang
Summary: This paper proposes a method to weaken scouring by changing the fluid movement pattern based on a bionic wave structure (BWS). It compares the wake vortices and quantifies the development history of scour depth and bed evolution under different protective structures. The results show that BWS has a good vortex breaking effect and can reduce scour depth and increase siltation depths.
Article
Engineering, Ocean
Zhaoyu Wang, Nan Zhang, Yong Jin, Qi Li, Junhao Xu
Summary: The study applied the MICP technique to sand embankments for scouring/erosion control in coastal areas of China, showing a significant improvement in anti-scouring/erosion performance. Experimental results indicated an increase in CaCO3 content in treated embankments and enhanced bonding strength due to MICP-induced CaCO3 formed at sand grain contact points. Further research on environmental factors and field implementation is needed.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2021)
Review
Environmental Sciences
Xiukai Wang, Yao Tang, Bo Huang, Tiantian Hu, Daosheng Ling
Summary: This paper comprehensively reviewed the mechanisms of soil internal erosion studied by numerical simulation, finding that geometric, mechanical, and hydraulic conditions have different impacts on internal erosion. The erosion process can be divided into particle detachment, transport, and clogging, with the characteristics of multi-factor coupling.
Article
Environmental Sciences
Kai Zhang, Hai-long Zhang, Yu-hui Deng, Jian-jun Qu, Zheng-hui Wang, Sheng Li
Summary: Based on numerical simulations, this study investigates the sedimentation and erosion issues around a sand barrier by analyzing the relationship between the shear stress of the surface and the critical shear stress of sand grains. The results show that vortex size and position on the leeward side of the sand barrier are influenced by the wind speed. The study also finds that the protection effect of a High Density Polyethylene (HDPE) board sand barrier is optimal when the porosity is 30%.
JOURNAL OF MOUNTAIN SCIENCE
(2023)
Article
Construction & Building Technology
Xianjie Hao, Liang Yuan, Zhuowen Sun, Yinpen Zhao, Bo Ren, Defu Zhao, Junhua Xue, Xiangyang Zhang, Guofeng Yu, Qian Zhang
Summary: This article quantitatively analyzes the influence of unloading rate and unloading magnitude on the stability of surrounding rock of underground tunnel through large-scale physical model tests and numerical simulations combined with water bag filling technology to simulate high-speed unloading excavation. The results show that the impact of low-speed unloading and high-speed unloading on the surrounding rock of the tunnel is different, with low-speed unloading reducing the possibility of dynamic disasters and high-speed unloading possibly leading to more severe dynamic disasters.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Mohammad Hossein Arabnejad, Urban Svennberg, Rickard E. Bensow
Summary: The paper proposes a numerical method based on energy description to assess the risk of cavitation erosion, with two improvements compared to other methods. Validation with experimental data shows good agreement between predicted high erosion risk areas and experimental erosion patterns. The method can also be used to study the relationship between cavity dynamics and cavitation erosion risk.
Article
Geosciences, Multidisciplinary
Yan Wujian, Tian Xinxin, Wu Zhijian, Wang Ping, Kang Lin
Summary: A large shaking-table test was conducted to simulate a loess landslide and analyze its dynamic response characteristics under the same seismic wave characteristics as the 2013 Minxian-Zhangxian M6.6 earthquake. The results indicate non-linear amplification effects along the slope surface and in the loess vertical direction, with maximum amplification at the top of the slope. The ground-motion acceleration waveforms and PGA values obtained from the model test and numerical simulation were similar. Fourier analysis showed that the main frequencies observed in the model test and numerical simulation were different.
FRONTIERS IN EARTH SCIENCE
(2023)
