Fully nonlinear evolution of a cylindrical vortex sheet in incompressible Richtmyer-Meshkov instability.
Fully nonlinear evolution of a cylindrical vortex sheet in incompressible Richtmyer-Meshkov instability.
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DOI：
10.1103/physreve.73.055304
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发表时间：
2006-05
期刊：
影响因子：
--
通讯作者：
C. Matsuoka;K. Nishihara
中科院分区：
文献类型：
--
作者：
C. Matsuoka;K. Nishihara
本文将不可压Richtmyer-Meshkov不稳定性中的圆形界面视为两种不同流体之间的非均匀涡面，研究其完全非线性运动。圆柱体几何结构具有许多特点，如存在两个独立的空间尺度，半径和波长，以及气泡和尖峰的进出生长。几何的复杂性导致的结果，涡面的非线性动力学是由向内和向外的运动，而不是气泡和尖峰，以及强烈依赖于模式数的非线性增长。
Fully nonlinear motion of a circular interface in incompressible Richtmyer-Meshkov instability is investigated by treating it as a nonuniform vortex sheet between two different fluids. There are many features in cylindrical geometry such as the existence of two independent spatial scales, radius and wavelength, and the ingoing and outgoing growth of bubbles and spikes. Geometrical complexities lead to the results that nonlinear dynamics of the vortex sheet is determined from the inward and outward motion rather than bubbles and spikes, and that the nonlinear growth strongly depends on mode number.