典型文献
Numerical model of local scour considering the unsteady sediment inflow and sediment sorting:Application to scour upstream of slit weir
文献摘要：
The current study proposes a novel framework for the numerical model for estimating the temporal scour considering unsteady sediment inflow and the sediment sorting process.The framework was applied to local scour upstream of a slit weir.The scour model is based on an ordinary nonlinear dif-ferential equation derived from sediment continuity and scour rate equations.A one-dimensional(1-D)Boussinesq-type model coupled with nonequilibrium sediment transport was incorporated in the scour model to consider unsteady sediment inflow.In addition,a mixing layer approach was incorporated to determine temporal variations in particle size in the scour hole.The proposed framework was validated using scour experiments conducted under conditions that include non-uniform sediment,live-bed scour,and unsteady flow rate.The simulation results showed satisfactory agreement with experimental results for the scour upstream of a slit weir.The proposed model appropriately explained the hysteresis process for flow unsteadiness,refilling process for live-bed scour,and armoring process for non-uniform sedi-ments.In addition,the model framework proposed in the current study is applicable to local scour around other hydraulic structures(e.g.,bridge piers)upon establishing the scour rate equation.There-fore,the current study provides a novel approach for modeling temporal scour that is required to consider unsteady sediment inflow and sediment sorting.
文献关键词：
中图分类号：
作者姓名：
Kazuyuki Ota;Takahiro Sato;Ryosuke Arai
作者机构：
Meteorology and Fluid Science Division,Central Research Institute of Electric Power Industry,Chiba,Japan
文献出处：
引用格式：
[1]Kazuyuki Ota;Takahiro Sato;Ryosuke Arai-.Numerical model of local scour considering the unsteady sediment inflow and sediment sorting:Application to scour upstream of slit weir)[J].国际泥沙研究（英文版）,2022(04):469-483
A类：
weir,refilling,armoring
B类：
Numerical,local,scour,considering,unsteady,sediment,inflow,sorting,Application,upstream,slit,current,study,proposes,novel,framework,numerical,estimating,temporal,process,was,applied,ordinary,nonlinear,dif,ferential,derived,from,continuity,equations,dimensional,Boussinesq,type,coupled,nonequilibrium,transport,incorporated,In,addition,mixing,layer,approach,determine,variations,particle,size,hole,proposed,validated,using,experiments,conducted,under,conditions,that,include,uniform,live,bed,simulation,results,showed,satisfactory,agreement,experimental,appropriately,explained,hysteresis,unsteadiness,applicable,around,other,hydraulic,structures,bridge,piers,upon,establishing,There,fore,provides,modeling,required
AB值：
0.392399
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