A Rolling Grant in Astrophysical Fluid Dynamics

许多天体物理现象都涉及磁场、旋转和流体流动之间复杂的相互作用。我们打算开展一项系统和综合的研究方案，调查各种天体之间的这种复杂的相互作用。我们将利用分析和数值技术（包括应用最先进的数值算法优化用于大规模并行机）的组合，以获得对这种现象的理解。我们的统一理念是研究这些天体物理流体中潜在的基本物理相互作用，并利用在一个领域获得的专业知识，以便在具有相同基本物理结构的不同物体上取得进展。我们讨论的物理现象是：（1）太阳磁场的产生，包括著名的11年太阳黑子周期的形成。(2)太阳黑子的结构与日冕磁场的联系。(3)行星中对流的形式和磁场的产生。(4)中子星磁场的衰减（5）快速自转恒星的动力学。

Many astrophysical phenomena involve the complex interaction between magnetic fields, rotation and fluid flows. We intend to undertake a systematic and integrated programme of research to investigate this complex interaction in a wide variety of astrophysical objects. We shall utilise a combination of analytical and numerical techniques (including the application of cutting edge numerical algorithms optimised for use on massively parallel machines) to gain an understanding of such phenomena. Our unifying philosophy is to investigate the underlying fundamental physical interactions in these astrophysical fluids and to use expertise gained in one area in order to make progress on different objects that have the same underlying physical structures. The physical phenomena that we address are (1) The generation of magnetic fields in the Sun, including the formation of the well-known eleven year sunspot cycle. (2) The structure of sunspots and the link with the magnetic fields in the solar corona. (3) The form of convection and the generation of magnetic fields in planets. (4) The decay of magnetic fields in neutron stars (5) The dynamics of rapidly-rotating stars.