Dynamics of Suppressed Mixing Regimes in Australian Rivers

澳大利亚河流抑制混合机制的动态

• 批准号: DP220100706
• 负责人: Prof Steven Armfield
• 金额: $ 33.81万
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2022
• 资助国家: 澳大利亚
• 起止时间: 2022-06-15 至 2025-06-14
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP220100706
• 关键词: Dynamics; Suppressed; Mixing; Regimes; Australian

This study aims to further the fundamental science of turbulent mixing in the context of flow in Australian rivers. The focus is on prolonged low flow conditions which when coupled with warm surface temperatures cause the water column to become thermally stratified which then suppresses turbulent mixing. The extreme scale of the river systems has made investigating the true dynamics of the strongly stratified mixing regimes particularly challenging. By taking world first in-situ measurements of turbulent mixing and undertaking high resolution numerical simulations this study will provide definitive data which will allow correct characterization of the mixing regimes and how they are associated with river flow conditions.

这项研究的目的是在澳大利亚河流水流的背景下进一步研究湍流混合的基础科学。重点是长时间的低流量条件，当再加上温暖的表面温度时，会导致水柱变得热分层，从而抑制湍流混合。河流系统的极端规模使得研究强烈分层混合制度的真实动态特别具有挑战性。通过进行世界上第一次湍流混合的现场测量和进行高分辨率的数值模拟，这项研究将提供明确的数据，使人们能够正确地描述混合制度及其与河流流动条件的关系。