基于大涡模拟的三角形地形之层结流体湍动能收支模型  

Large eddy simulation model for the turbulent kinematic energy budget of a stratified fluid over triangular topography

作　　者：阳德华 李爽[1] 陆宗泽 仇颖 YANG De-hua;LI Shuang;LU Zong-ze;QIU Ying(Institute of Physical Oceanography and Remote Sensing, Zhejiang University, Zhoushan 316000, China)

机构地区：[1]浙江大学海洋学院物理海洋与遥感研究所

出　　处：《海洋科学》2019年第2期18-26,共9页Marine Sciences

基　　金：国家重点研发计划项目(2016yfc1401404,2017yfa0604102;国家自然科学基金项目(41876003))~~

摘　　要：为了探究海底地形对湍流动能收支的影响,本文使用并行大涡模拟模式(The ParallelizedLarge-Eddy Simulation Model, PALM),以坡陡作为无量纲地形参数(δ),设置了亚临界、临界和超临界三种地形状态(δ=0.5, 1 和 2)进行数值模拟。文章计算并呈现了地形作用下的流体速度和湍流动能收支分布,以及湍流动能平衡方程各参量。通过回归分析和量纲分析重点讨论了地形顶点处耗散和海表处能量的耗散,与地形坡陡的关系,得出其关系均呈指数形式。In this paper, to simulate the influence of submarine topography on turbulent kinetic energy balance, we used a parallel large-eddy simulation model, namely, PALM, and set up three terrains with slope as a dimensionless terrain parameter: slope δ= 0.5, 1, and 2, represents three kinds of terrains, the critical, subcritical, and supercritical state, respectively. We introduced a parallel large-eddy simulation model and analyzed the distribution of velocity and turbulent kinetic energy budgets and parameters of the turbulent kinetic energy budget equation. Through re- gression analysis and dimensional analysis, our results explored the relation between dissipation of topography top and terrain slope and between dissipation of sea surface area and terrain slope.

关 键 词：大涡模拟 地形坡陡 湍流动能收支 

分 类 号：P731.26[天文地球—海洋科学]