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Numerical Simulations of Stellar Winds

机译:恒星风的数值模拟

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摘要

We discuss steady-state transonic outflows obtained by direct numerical solution of the hydrodynamic and magnetohydrodynamic equations. We make use of the Versatile Advection Code, a software package for solving systems of (hyperbolic) partial differential equations. We model thermal and magneto-centrifugally driven stellar outflows as generalizations of the well-known Parker and Weber-Davis wind solutions. To obtain steady-state solutions efficiently, we exploit fully implicit time stepping. Wind solutions containing both a 'wind' and a 'dead' zong are presented. We emphasize the boundary conditions imposed at the stellar surface. For axisymmetric wind solutions, we use the knowledge of the flux functions to verify the numerical solutions.
机译:我们讨论通过流体动力学和磁流体动力学方程的直接数值解获得的稳态跨音速流出。我们使用通用对流代码,该软件包用于求解(双曲型)偏微分方程组。我们将热和磁离心驱动的恒星流出建模为著名的Parker和Weber-Davis风解决方案的推广。为了有效地获得稳态解,我们利用了完全隐式的时间步长。提出了同时包含“风”和“死”宗的风解决方案。我们强调强加于恒星表面的边界条件。对于轴对称风解,我们使用通量函数的知识来验证数值解。

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