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STRUCTURES OF CONFINED VORTEX BREAKDOWN IN CONSTANT DIAMETER PIPE FLOW

Journal of Hydrodynamics 2009年第3期21卷 341-346页

作者： WANG Ze CHEN Shan-qun College of Environmental Science and Engineering Hohai University Nanjing 210098 China moe key laboratory for integrated regulation and resources exploration on shallow lake Nanjing 210098China

Numerical solutions of three-dimensional, incompressible and unsteady Navier-Stokes equations for constant diameter swirling pipe flows are used to study vortex breakdown, including the detailed flow structures in the bubble domain and the ＂tail＂ behind the bubble during the vortex breakdown, and a comparison is made between the numerical solutions and the experimental results.

关键词： vortex breakdown confined swirling flow numerical simulation

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Impact of transferred water on the hydrochemistry and water quality of surface water and groundwater in Baiyangdian lake,North China

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Geoscience Frontiers 2021年第3期12卷 104-112页

作者： Yong Zhao Jingyan Han Bing Zhang Jiaguo Gong State key laboratory of Simulation and regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China College ofWater Conservancy Engineering Tianjin Agricultural UniversityTianjin 300384China Tianjin key laboratory of Water resources and Environment Tianjin Normal University300387 TianjinChina

The hydrochemical composition of surface water and groundwater is a key parameter for understanding the evolution of water and its *** particular,little is known about the impact of transferred water on surface water and *** this study,Baiyangdian lake was selected as a typical area for extensive groundwater exploration and surface water transfer in the North China *** water and groundwater samples were sampled in dry/wet seasons and then analyzed before/after the water transfer,***,surface water and groundwater are extensively hydrologically connected based on hydrochemical *** was found that the hydrochemical composition of the shallow groundwater is affected by the surface water and that the water quality of the deep groundwater is ***,inter-aquifer recharge processes from the shallow groundwater to the deep groundwater existed in the anthropogenic region impacted with high nitrate-ion ***,the hydrochemical composition of the surface water and groundwater was dominated by rock-weathering and evaporation-precipitation *** to the existence of the deep vadose zone in the alluvial fan,Na^(+)was exchanged into soil matrices during the leakage of the surface *** addition,the transferred water resulted in surface water with good quality,and it also played as an important recharge source to *** the most important water resource for irrigation and drinking,deep groundwater should be paid more attention in the alluvial fan with frequent water transfer and extensive groundwater exploration.

关键词： Hydrochemical composition Surface water Groundwater Water transfer Baiyangdian lake

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