Studies of Unsteady Two-Layer Strait and Sill Flow

非定常两层海峡与基台流研究

• 批准号: 9022088
• 负责人: Karl Helfrich
• 金额: $ 16.75万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022088&HistoricalAwards=false
• 关键词: Studies; Unsteady; Two; Layer; Strait

In this project, the P.I. will carry out laboratory experiments and numerical studies of unsteady two-layer strait and sill flow. Analysis of such flows typically uses steady or quasi-steady two- layer hydraulic theory, the validity of which has not been adequately tested for time-dependent flows, such as barotropic tidal forcing. The first approach to this problem will be a laboratory experiment on the effect of unsteady barotropic forcing on the classic lock-exchange problem, focusing on issues of control establishment and maximal exchange. The second approach will be a numerical study of the generation of long nonlinear- dispersive waves by time dependent transcritical forcing.

在这个项目中，P.I.将进行实验室实验 以及非定常两层窄流和底流的数值研究。 对这种流动的分析通常使用定常或准定常双- 分层水力学理论，其有效性尚未得到验证 充分测试了随时间变化的气流，如正压气流 潮汐力 解决这个问题的第一个方法是 非定常正压强迫效应的实验研究 在经典的锁交换问题上， 控制建立和最大化交换。 第二种方法 将是一个数值研究的产生长的非线性- 时变跨临界强迫引起的色散波。