CONCENTRATION DISTRIBUTION OF SEDIMENT IN BED LOAD LAYER

作     者：ZHONGDe-yu ZHANGHong-wu ZHONG De-yu, ZHANG Hong-wu Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China,

作者机构：DepartmentofHydraulicEngineeringTsinghuaUniversityBeijing100084China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2004年第16卷第1期

页      面：28-33页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：theNationalNaturalScienceFoundationofChina.(GrantNo :5 0 2 0 90 0 5 ) 

主　　题：bed load concentration distribution turbulence burst 

摘      要：In this paper the concentration profile in bed load layer is derived based onkinetic theory. According to observations, particles moving in near wall region behave differentlyduring ejection and sweeping of turbulence burst, as indicates that they are subject to differentinfluences from turbulence, and therefore, the forces acting on particles are not the ***, particles moving in bed load layer are classified into two groups, one lifted upwardby ejections, the other carried back to bed by sweepings, and the forces corresponding to upward anddownward motions are proposed. By solving the basic transport equation of kinetic theory, thevelocity distribution functions, upward and downward fluxes of particles in bed load layer arederived. Upon assumption of e-quilibrium sediment transport, concentration profile in bed load layeris obtained. Verification is also presented in this paper, which shows that the concentrationprofile produced by the relation proposed in this paper agrees with observations well.