Current-vortex-sheet model of the magnetic Rayleigh-Taylor instability.

IF 2.4 3区物理与天体物理 Q1 Mathematics Physical review. E Pub Date : 2024-11-01 DOI:10.1103/PhysRevE.110.055102

Seunghyeon Baek, Sung-Ik Sohn

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Abstract

This study investigates the Rayleigh-Taylor instability in the magnetic field applied parallel to the interface. The motion of the interface is described using a current-vortex-sheet model. The growth rate of the interface is obtained from a linear stability analysis of the model. The interface of a single mode k=1 is linearly stable for R_{A}≤1, where R_{A} denotes the Alfvén number. Further, we conduct numerical computations for the evolution of the interface from the model for both regimes of R_{A}≤1 and R_{A}>1. For R_{A}≤1, the interface oscillates vertically but does not intrude into the opposite phase. The amplitude of the interface and the oscillation period decrease with decrease in R_{A}. For 1

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磁瑞利-泰勒不稳定性的电流-涡片模型。

本研究探讨了平行于界面的磁场中的瑞利-泰勒不稳定性。界面的运动采用电流涡流片模型进行描述。通过对模型的线性稳定性分析得出了界面的增长率。当 R_{A}≤1 时，单一模式 k=1 的界面是线性稳定的，其中 R_{A} 表示阿尔弗文数。此外，我们还对 R_{A}≤1 和 R_{A}>1 两种情况下模型界面的演变进行了数值计算。对于 R_{A}≤1，界面垂直摆动，但不会侵入相反的相位。界面振幅和振荡周期随着 R_{A} 的减小而减小。对于 1

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来源期刊

Physical review. E 物理-物理：流体与等离子体

CiteScore

4.60

自引率

16.70%

发文量

审稿时长

3.3 months

期刊介绍： Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.