Near-surface interactions between strongly nonlinear internal gravity waves

强非线性内部重力波之间的近地表相互作用

• 批准号: 1946028
• 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: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1946028
• 关键词: Near; surface; interactions; between; strongly

This work will work will focus on the dynamics of internal gravity waves, with particular emphasis on the (nonlinear) interaction between wave beams, the interaction of wave beams with boundaries, the amplification of waves by shear at the surface mixed layer, and the breaking of the waves to generate stratified turbulence. The work will combine a blend of laboratory experimentation (using techniques such as Particle Image Velocimetry, Laser Induced Fluorescence and Synthetic Schlieren), numerical modelling (using Direct Numerical Simulation) and analytical modelling (with techniques ranging from ray tracing and triadic interactions to dimensionality reduction via Dynamic Mode Decomposition and Koopman Modes).

这项工作将集中在内部重力波的动力学，特别强调波束之间的(非线性)相互作用，波束与边界的相互作用，在地面混合层通过剪切放大波，以及波的破裂产生分层湍流。这项工作将结合实验室实验(使用粒子图像测速仪、激光诱导荧光和合成纹影等技术)、数值建模(使用直接数值模拟)和分析建模(使用从光线跟踪和三元相互作用到通过动态模式分解和库普曼模式进行降维的技术)。

项目成果

Triadic Resonance Instability in finite-width internal gravity wave beams

有限宽度内部重力波束的三元共振不稳定性

• 发表时间: 2021
• 作者: Grayson, K. M.

Experimental evidence of internal wave attractor signatures hidden in large-amplitude multi-frequency wave fields

隐藏在大振幅多频波场中的内波吸引子特征的实验证据

• 发表时间: 2021
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Beckebanze F

The long view of triadic resonance instability in finite-width internal gravity wave beams

有限宽度内重力波束三元共振不稳定性的远景

• DOI: 10.1017/jfm.2022.914
• 发表时间: 2022
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Grayson K