The strato-rotational instability of channel flows

河道流的平转不稳定性

• 批准号: 21K03878
• 负责人: Wall Darren
• 金额: $ 2.66万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K03878/
• 关键词: Taylor-Dean flow; stratorotational; stratified flow; rotation; channel flow

This project focuses on the interaction of rotational stability mechanisms with those associated with density stratification. However, following the recent revelation that Rayleigh-stable flows can become unstable at sufficiently large Reynolds numbers (Deguchi Phys. Rev. E 95 021102(R) 2017), it was considered of interest to first explore and clarify this new instability mechanism, since it is not clear whether it is intrinsically related to curvature or rotation.We are thus considering a Taylor-Dean flow, adopting a non-traditional mathematical formulation of this problem in which the effects of shear, curvature and rotation can be controlled. The problem is of interest for its own sake, but also permits an investigation of the interaction of this new mechanism with stratification.

该项目的重点是旋转稳定机制与与密度分层相关的机制的相互作用。然而，在最近的启示之后，在足够大的雷诺数字上可能会变得不稳定（DeguchiPhys。E95 021102（R）2017），首先探索并澄清这种新的不稳定性机制是有意思的可以控制剪切，曲率和旋转影响的该问题的数学公式。出于自身的缘故，这个问题引起了人们的关注，但也允许研究这种新机制与分层的相互作用。