典型文献
Impact of depth ratio on flow structure and turbulence characteristics of compound open channel flows
文献摘要：
Compound open channel flows appear in most natural rivers are of great importance in river management and flood control.In this study,large eddy simulations were carried out to simulate the compound open channel flows with four different depth ratios(hr=0.10,0.25,0.50,and 0.75).The main flow velocity,secondary flow,Reynolds stress,and bed shear stress were obtained from numerical simulations.The depth-averaged stream wise momentum equation was used to quantify the lateral momentum exchange between the main channel and floodplain.The instantaneous coherent structures were presented by the Q criterion method.The impact of hr on flow structure and turbulence charac-teristics was analyzed.The results showed that with the increase of hr,the high velocity area in the main channel shifted to the floodplain,and the dip phenomenon became more obvious;the Reynolds stress largely contributed to the lateral momentum exchange within the flows near the side walls of floodplain;and the vortex structures were found to significantly increase in the floodplain region.
文献关键词：
中图分类号：
作者姓名：
Shao-wei Ding;Cheng Zeng;Jie Zhou;Ling-ling Wang;Chen Chen
作者机构：
College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China
文献出处：
引用格式：
[1]Shao-wei Ding;Cheng Zeng;Jie Zhou;Ling-ling Wang;Chen Chen-.Impact of depth ratio on flow structure and turbulence characteristics of compound open channel flows)[J].水科学与水工程,2022(03):265-272
A类：
B类：
Impact,depth,turbulence,characteristics,compound,open,channel,flows,Compound,appear,most,natural,rivers,great,importance,management,control,In,this,study,eddy,simulations,were,carried,out,simulate,four,different,ratios,hr,main,velocity,secondary,Reynolds,stress,bed,shear,obtained,from,numerical,averaged,stream,wise,momentum,equation,was,used,quantify,lateral,exchange,between,floodplain,instantaneous,coherent,structures,presented,by,criterion,method,impact,analyzed,results,showed,that,increase,high,area,shifted,dip,phenomenon,became,more,obvious,largely,contributed,within,near,side,walls,vortex,found,significantly,region
AB值：
0.532865
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