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A Numerical Analysis on the Large-Scale Vortices of Jupiter's Polar Regions

木星极区大尺度涡旋的数值分析

基本信息

批准号：
2888286
负责人：
金额：
--
依托单位：
Newcastle University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2888286
关键词：
Numerical Analysis Large Scale Vortices

项目摘要

The captivating winds of Jupiter's atmosphere, characterised by the iconic east-west bands flowing along it's equatorial region, have long fascinated researchers. The origins of these bands are well understood to be created by Jupiter's strong zonal wind jets. Recent imagery from the NASA Juno spacecraft has shown spectacular cyclones on the polar regions of Jupiter, vast in size, long-lived, and beautifully arranged in clusters of five to eight vortices around a larger vortex at the poles. Despite the prominence, the origin of these cyclones largely remain a mystery, motivating extensive international research.This project aims to explain the formation of the large-scale vortices (LSVs) and how they interact with the convection layer of the Jovian atmosphere. In the depth of Jupiter's atmosphere, where convection currents and planetary rotation dictate the dynamics, the study employs a 3D rotating turbulent Rayleigh-Bénard convection model with Boussinesq dynamics. Using existing codes as a basis, the simulations will be run on the high-performance computing facilities to perform the computations with parallel processing, due to the dynamics being strongly non-linear. Specifically, the investigation will employ the deep model to explore the formation of LSVs under a low Prandtl number (the ratio of viscosity to thermal diffusivity) of order 0.01. This will allow for studying the stability of the LSVs over long periods of time.

木星大气层中迷人的风，以沿着赤道区域流动的标志性东西向带为特征，长期以来一直吸引着研究人员。这些光带的起源被认为是由木星强烈的纬向风喷流造成的。美国宇航局朱诺号航天器最近拍摄的图像显示，木星极地地区有壮观的气旋，规模巨大，寿命长，在极地一个较大的漩涡周围美丽地排列着五到八个漩涡。尽管如此，这些气旋的起源在很大程度上仍然是一个谜，激发了广泛的国际研究。该项目旨在解释大尺度涡旋（LSV）的形成以及它们如何与木星大气的对流层相互作用。在木星大气层的深处，对流和行星旋转决定了动力学，该研究采用了具有Boussinesq动力学的3D旋转湍流Rayleigh-Bénard对流模型。使用现有代码作为基础，模拟将在高性能计算设施上运行，以并行处理进行计算，因为动态是强非线性的。具体而言，调查将采用深层模型，探索低普朗特数（粘度与热扩散率之比）的顺序为0.01下的LSV的形成。这将允许研究LSV在长时间内的稳定性。