Efficiency of Mixing in Thin Stratified Layers

薄分层中的混合效率

• 批准号: 0221057
• 负责人: William Smyth
• 金额: $ 34.23万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-11-15 至 2005-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221057&HistoricalAwards=false
• 关键词: Efficiency; Mixing; Thin; Stratified; Layers

0221057 SmythA sequence of direct numerical simulation (DNS) experiments designed to extend earlier two-dimensional results to more general ocean flows will be performed. Turbulence evolution will be simulated in a variety of initial flows in which density changes in thin layers (compared with velocity) and oscillatory instability results. The physics of turbulence will be studied in detail, and turbulence statistics will be compared with DNS of Kelvin-Hemholtz billows, with laboratory experiments on Holmboe waves, and with turbulent events observed in the ocean as has been done for Kelvin-Helmholtz waves. Besides adding directly to the knowledge of oscillatory instabilities in the ocean, diagnostics that will permit the identification of instability classes (e.g. Kelvin-Helmholtz or Holmboe) more clearly in future observational studies will be defined.

0221057 SmythA序列的直接数值模拟（DNS）实验，旨在扩大早期的二维结果，更一般的海洋流动将被执行。湍流演化将在各种初始流中进行模拟，其中薄层中的密度变化（与速度相比）和振荡不稳定性结果。湍流的物理学将进行详细研究，湍流统计将与开尔文-赫姆霍尔茨波涛的DNS进行比较，与Holmboe波的实验室实验进行比较，并与在海洋中观察到的湍流事件进行比较。除了直接增加对海洋振荡不稳定性的了解外，还将确定诊断方法，以便在今后的观测研究中更清楚地确定不稳定性类别（例如Kelvin-Helmholtz或Holmboe）。