NUMERICAL COMPUTATION OF VERTICAL TWO-DIMENSIONALNON-EQUILIBRIUM SEDIMENT MOVEMENT

作     者：HUANG Yongiian (1 China Institute of Water Resources and Hydropower Research, P.O.Box 366,Beijing 100044.) 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：1999年第14卷第2期

页      面：251-257页

核心收录：

学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 

主　　题：Non-equilibrium sediment transport Sediment concentration Numerical model Velocity field 

摘      要：Non-equilibrium sediment transport is studied by using a numerical solution of vertical two dimensional diffusion equations. Sediment concentration on the bed is determined as the boundary condition of diffusion equation based the sediment carrying capacity of local flow. The velocity field is solved and then the two dimensional diffusion equations in each section along the flow direction are solved. The vertical distribution of sediment concentration is determined and then the quantities of erosion or siltation are obtained along the cross sections. The usage of this numerical computation method is further explained in unsteady flow examples.