标题： 热意大利面：粘性引力坍缩 显示英文标题

标题： Hot Spaghetti: Viscous Gravitational Collapse

摘要： 我们研究了物质落入宏观史瓦西黑洞的命运，在简化的情况下，即径向坍缩的薄球壳，并且可以忽略几何形状的反作用力。 我们在粘性相对论流体力学的框架内处理下落物质的内部动力学，并计算坍缩物质的内部温度如何随其向史瓦西奇点下落而演化。 我们发现，当耗散径向压力超过热压并且总径向压力变为负值时，或者作用于坍缩物质上的潮汐力的变化时间尺度短于特征流体动力学响应时间时，粘性流体力学失效。 显示英文摘要

摘要： We explore the fate of matter falling into a macroscopic Schwarzschild black hole for the simplified case of a radially collapsing thin spherical shell for which the back reaction of the geometry can be neglected. We treat the internal dynamics of the infalling matter in the framework of viscous relativistic hydrodynamics and calculate how the internal temperature of the collapsing matter evolves as it falls toward the Schwarzschild singularity. We find that viscous hydrodynamics fails when either, the dissipative radial pressure exceeds the thermal pressure and the total radial pressure becomes negative, or the time scale of variation of the tidal forces acting on the collapsing matter becomes shorter than the characteristic hydrodynamic response time.