淹没水跃的数值模拟  

Numerical simulation of submerged hydraulic jump

作　　者：杨建明[1] 吴建华[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《水动力学研究与进展（A辑）》2001年第4期405-411,共7页Chinese Journal of Hydrodynamics

摘　　要：本文通过求解时均 N- S方程 k-ε紊流模型 ,数值模拟了淹没水跃由静止到最终稳定的全过程。采用隐式非正交同位网格有限体积法离散控制方程组 ,利用动网格技术跟踪自由表面 ,并由 Orlanski开边界条件得到无反射的出口边界。文中给出了淹没水跃在不同时刻自由表面形状、内部流场结构和流速矢量的变化情况 ,并与试验资料进行了比较。结果表明 。In this paper, the submerged hydraulic jump from rest to steadiness was simulated numerically. The Reynolds averaged N S equations and the equations resulted from the standard k ε turbulence model were solved by the implicit finite volume method with colocated variable arangement using the boundary fitted non orthogonal grid. Moving grid technique was used to track the free surface and the Orlanski open boundary condition was used to obtain a non reflected outlet boundary condition. The evolutions of free surface, inner field structure and velocity vector at different time were studied, and the final results were compared with experimental data. The results show that the given method can be employed to describe the turbulence characteristics of the complex free surface flows, e.g. submerged hydraulic jump, efficiently and correctly.

关 键 词：淹没水跃 数值模拟 自由表面流动 体积守恒定律 动网格 Orlanski开边界条件 时均N-S方程 Κ-Ε紊流模型 离散控制方程组 

分 类 号：O357.5[理学—流体力学]