典型文献
A zero-flux principle for extracting secondary flows in arbitrary vertical planes of natural rivers
文献摘要：
The cross-sectional transverse flow field(represented by uτ)of rivers comprises a convective part(represented by ucon)and a circulatory part(represented by ucirc),and a zero-flux principle of the ucirc has been known for a long time.However,it is still difficult to separate the circulatory part from the convective part quantitatively in a 3-D velocity field,for an arbitrarily vertical plane in natural rivers of irregular shape.In this study,a zero-flux principle of the uτ is derived,to replace the old zero-flux principle of the ucirc.Based on the new principle,an all-purpose new method is proposed for extracting the circulations in arbitrary vertical planes of natural rivers of irregular shape.The calculation with the new method requires only the distribution of the horizontal velocities of a single vertical line(VL),and is simple.The calculation can be made based on either the velocity field simulated by a 3-D hydrodynamic model or the field measurements obtained by the acacoustic Doppler velocimetry(ADV).The new method is validated by using the field data of the lower Yangtze River.The extracted circulations are reasonable,while the results of the circulation extraction,respectively,based on the velocity field of a 3-D model and the field measurements of the ADV,are shown to be consistent.The capability of the method is also demonstrated,using the typical riverbends of the Yangtze River as examples.
文献关键词：
中图分类号：
作者姓名：
De-chao Hu
作者机构：
Department of Hydraulic Engineering,Yangtze River Scientific Research Institute,Wuhan 430010,China;School of Civil and Hydraulic Engineering,Huazhong Univ.of Science and Technology,Wuhan 430074,China
文献出处：
引用格式：
[1]De-chao Hu-.A zero-flux principle for extracting secondary flows in arbitrary vertical planes of natural rivers)[J].水动力学研究与进展B辑,2022(04):744-755
A类：
ucon,ucirc,acacoustic,riverbends
B类：
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AB值：
0.436822
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