三维磁Rayleigh-Taylor不稳定性
The Magnetic Rayleigh-Taylor Instability in Three Dimensions
摘要：
本文研究了三维空间中的瑞利-泰勒不稳定性，重点讨论了不同初始场位形引起的非线性结构和演化。我们研究强场的意义上的临界波长l_c沿场的扰动是稳定的，是一个大的分数的大小的计算域。我们考虑磁场最初是平行的界面，但有各种配置，包括均匀无处不在，均匀的光流体，和领域的改变方向的接口。强磁场不抑制不稳定性，事实上，通过抑制二次剪切不稳定性，它们减少了重流体和轻流体之间的混合，并导致气泡和指状物的生长速率与流体动力学相比增加。平行于界面但方向改变的场产生长的、孤立的指状物，它们被临界波长l_c分开，这可能与蟹状星云中光学细丝的形态有关。
英文摘要：
We study the magnetic Rayleigh-Taylor instability in three dimensions, with focus on the nonlinear structure and evolution that results from different initial field configurations. We study strong fields in the sense that the critical wavelength l_c at which perturbations along the field are stable is a large fraction of the size of the computational domain. We consider magnetic fields which are initially parallel to the interface, but have a variety of configurations, including uniform everywhere, uniform in the light fluid only, and fields which change direction at the interface. Strong magnetic fields do not suppress instability, in fact by inhibiting secondary shear instabilities, they reduce mixing between the heavy and light fluid, and cause the rate of growth of bubbles and fingers to increase in comparison to hydrodynamics. Fields parallel to, but whose direction changes at, the interface produce long, isolated fingers separated by the critical wavelength l_c, which may be relevant to the morphology of the optical filaments in the Crab nebula.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
