摘要
大多数平原河道都为具有主槽和滩地的复式河槽,且主槽和滩地的壁面粗糙度一般不相同.根据理论分析建立了适合于描述水力光滑、水力过渡和水力粗糙这三种壁面条件下时均流速沿垂线分布的统一公式,并利用该流速分布公式,采用Thatchell代数应力模型,对复式明渠粗糙度沿横向存在变化的流动进行了三维模拟.
Compound open channel flows widely exist in nature and there usually exist lateral change in bed roughness between the main channel and the flood-plains. Based on theoretical analysis, a unified formula for the velocity distribution is suggested to fulfill all the wall conditions, which include the hydraulic smooth region, transitional region and rough region. With Thatchell＇s algebraic stress model and the formula suggested in this paper, the 3-D flow in the compound channel with lateral change in bed roughness is simulated.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2006年第6期1-5,共5页
Engineering Journal of Wuhan University
关键词
复式明渠
二次流
流动模拟
compound open channel
secondary flow
flow simulation
