Equatorial waves and instabilities in astrophysical shear flows

赤道波和天体物理剪切流的不稳定性

• 批准号: 2277136
• 金额: --
• 依托单位: University of Leeds
• 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-2277136
• 关键词: Equatorial; waves; instabilities; astrophysical; shear

Magnetic fields are often thought to be a stabilising influence on shear flows, but this is not always the case. This project would investigate the ways in which the addition of magnetic fields can change the stability properties of the underlying purely hydrodynamic flows, which is already subject to rotation and density stratification in typical applications. The focus will be on equatorial flows, where there are often strong jets that can become hydrodynamically unstable. In particular, this project will extend the theory of hydrodynamic equatorial inertial instabilities to allow for magnetic fields. There are applications to understanding the stability of planetary and stellar atmospheres and interiors, and understanding the strength of equatorial jets on hot Jupiters.

磁场通常被认为是对剪切流的稳定影响，但情况并非总是如此。该项目将研究磁场的加入如何改变基本纯流体动力学流动的稳定性，在典型应用中，这种流动已经受到旋转和密度分层的影响。重点将放在赤道气流上，那里经常有强烈的喷流，可能变得流体动力学不稳定。特别是，该项目将扩展流体动力学赤道惯性不稳定性理论，以考虑磁场。它可以应用于了解行星和恒星大气和内部的稳定性，以及了解热彗星上赤道喷流的强度。