Convective overshooting from stellar cores: 3D simulation and Reynold's stress models

恒星中心区域的对流对确定恒星如何演化非常重要，因为对流非常有效地混合中心核反应产生的化学元素。不稳定核心产生的对流将穿透不稳定区域的边界，影响恒星的结构并扩大混合在核心中的质量。这改变了恒星的演化，结果是估算恒星系统的年龄，以及演化到超新星的后期阶段。我建议对恒星内部的对流进行全三维数值模拟，并开发所谓的雷诺应力模型，以了解一系列恒星条件下的这种现象，包括旋转和磁场。

Convection in the central regions of stars is very important in determining how stars evolve since convection is very efficient at mixing the chemical elements produced by nuclear reactions in the centre Convection generated in an unstable core will penetrate beyond the boundary of the unstable region affecting both the structure of the star and enlarging the mass that is mixed in the core. This changes the evolution of the star, with consequences for estimating the age of stellar systems, and the late stages of evolution up to supernovae. I propose to undertake full 3-dimensional numerical simulations of convection in stellar interiors and also to develop so called Reynold's stress models to understand this phenomenon for a range of stellar conditions, including rotation and magnetic fields.