论文标题
运动网格流体动力学中的运动和反应性边界条件
Moving and Reactive Boundary Conditions in Moving-Mesh Hydrodynamics
论文作者
论文摘要
我们概述了将移动边界条件实施到移动网格代码漫画中的方法。我们边界的运动对流体动力和重力作用。我们讨论了运动边界的流体动力学以及对流体动力和重力求解器的修改。还讨论了适当的初始条件以准确产生任意形状的边界。我们的代码适用于几个测试用例，包括SOD冲击管，Sedov-Taylor爆炸波和球体上的超音速风。我们在模拟中显示了保守数量的收敛性。我们通过模拟二进制系统中的一个共同的包络阶段来证明在天体物理设置中使用移动边界，其中伴随对象由球形边界建模。我们得出的结论是，我们的方法适合使用移动和反应性边界条件模拟天体物理系统。
We outline the methodology of implementing moving boundary conditions into the moving-mesh code MANGA. The motion of our boundaries is reactive to hydrodynamic and gravitational forces. We discuss the hydrodynamics of a moving boundary as well as the modifications to our hydrodynamic and gravity solvers. Appropriate initial conditions to accurately produce a boundary of arbitrary shape are also discussed. Our code is applied to several test cases, including a Sod shock tube, a Sedov-Taylor blast wave and a supersonic wind on a sphere. We show the convergence of conserved quantities in our simulations. We demonstrate the use of moving boundaries in astrophysical settings by simulating a common envelope phase in a binary system, in which the companion object is modeled by a spherical boundary. We conclude that our methodology is suitable to simulate astrophysical systems using moving and reactive boundary conditions.
