复式明渠水流运动的数值模拟  

Numerical simulation of compound open channel flow

作　　者：刘士和[1] 黄伟[1] 罗秋实[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2006年第6期1-5,共5页Engineering Journal of Wuhan University

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.

关 键 词：复式明渠 二次流 流动模拟 

分 类 号：TU133[建筑科学—建筑理论]