开闸式异重流头部结构的数值研究  

A numerical study on head structure of lock-release gravity currents

作　　者：张立柱[1] 安亦然[1] 李植[1] 陈国谦[1] 

机构地区：[1]北京大学力学与工程科学系湍流与复杂系统国家重点实验室,北京100871

出　　处：《水动力学研究与进展（A辑）》2004年第3期300-304,共5页Chinese Journal of Hydrodynamics

基　　金：教育部博士点基金;国家自然科学基金项目(10372006)

摘　　要：　本文采用重整化群(RNG)k ε湍流模式研究开闸式异重流头部结构,详细剖析异重流头部的流场、湍流动能和浓度分布,并解释异重流行进约10个闸长后头部行进速度降低的原因。The head structure of lock-release gravity current was numerically studied by the renormalization group (RNG) k-ε model for Reynolds-stress closure. Detailed numerical simulation was conducted and the head structure was characterized with the velocity vector diagram, distribution of turbulent kinetic energy, and concentration contour. The reason for the decrease of the front velocity of the current beyond its advancing distance of about 10 lock lengths was given.

关 键 词：异重流 湍流模拟 环境流体力学 

分 类 号：O357.1[理学—流体力学]