Memory effects in stably stratified turbulence

稳定分层湍流中的记忆效应

• 批准号: 2267848
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2267848
• 关键词: Memory; effects; stably; stratified; turbulence

Stably stratified turbulence (SST) is a model useful for understanding fluid flows that are highly intermittent and anisotropic at large scales. The understanding derived from SST is important for applications ranging from pollution mitigation, to deep sea mining, to human activities in regions of cold land or ice. SST is also valuable for enhancing fundamental turbulence theory on turbulent/non-turbulent interfaces, internal intermittency, and anisotropic multi-scale energetics. Recent work has identified the crucial difference between continuously forced SST and SST arising from an initial flow instability. Using a variety of mathematical and computational tools, this project will investigate in detail whether there are any identifiable generic properties of SST, or whether the initial conditions leave a sustained "imprint" on the subsequent turbulent evolution.

稳定分层湍流（SST）是一种用于理解大尺度下高度间歇性和各向异性的流体流动的模型。对SST的理解对于从减轻污染到深海采矿，再到寒冷地区或冰区的人类活动等各种应用都很重要。SST对于增强湍流/非湍流界面、内部不稳定性和各向异性多尺度能量学的基本湍流理论也很有价值。最近的工作已经确定了连续强迫SST和初始流动不稳定性引起的SST之间的关键区别。利用各种数学和计算工具，该项目将详细调查是否有任何可识别的SST的一般属性，或初始条件是否留下持续的“印记”在随后的湍流演变。

项目成果

Stratified turbulent mixing in oscillating shear flows

振荡剪切流中的分层湍流混合

• DOI: 10.1017/jfm.2022.537
• 发表时间: 2022
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Lewin S

Dynamically induced uncertainty in stratified turbulent mixing models

分层湍流混合模型中动态引起的不确定性

• DOI: 10.17863/cam.99707
• 发表时间: 2023
• 作者: Lewin S

A data-driven method for modelling dissipation rates in stratified turbulence

• DOI: 10.1017/jfm.2023.679
• 发表时间: 2023-12
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Sam F. Lewin;S. M. de Bruyn Kops;Colm‐cille P. Caulfield;G. Portwood

The influence of far field stratification on shear-induced turbulent mixing

远场分层对剪切引起的湍流混合的影响

• DOI: 10.1017/jfm.2021.755
• 发表时间: 2021
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Lewin S