摘要
通过求解时均N-S方程及K-ε湍流模型,数值模拟了典型水跃湍流由静止到最终稳定的全过程,采用VOF模型跟踪自由表面的变化。本文给出了水跃现象在不同时刻自由表面的变化情况,主要对水跃过程中自由表面的形状、内部流场结构、速度矢量场及压力场分布进行了分析。结果表明,VOF模型能够有效地描述水跃这类复杂自由表面流道的湍流特性,具有可行性与实用性。
all the time by solving the NS equations and the K-ε turbulence model,numerical simulation of a typical turbulent hydraulic jump from the static stability of the whole process to the final,free surface using VOF model tracking changes. In this paper, the phenomenon of hydraulic jump in free surface at different time changes, mainly on the hydraulic jump during the free surface shape and internal flow structure, velocity vector field and pressure distribution were analyzed. The results show that,VOF model can effectively describe the hydraulic jump such as a complex turbulent free surface flow characteristics,which has feasible and practical.
出处
《吉林水利》
2011年第4期30-34,共5页
Jilin Water Resources
关键词
水跃
自由表面流动
非定常
数值模拟
Submerged hydraulic jump
free surface flow
nonuniform flow
numerical simulation
