Magnetohydrodynamic Kelvin-Helmholtz instability for finite-thickness fluid layers

戴鸿昊; 徐妙华; 郭宏宇; 李英骏; 张杰

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Magnetohydrodynamic Kelvin-Helmholtz instability for finite-thickness fluid layers

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We have derived the analytical formulas for the Kelvin-Helmholtz instability(KHI)of two superposed finite-thickness fluid layers with the magnetic field effect into consideration.The linear growth rate of KHI will be reduced when the thickness of the fluid with large density is decreased or the thickness of fluid with small density is increased.When the thickness and the magnetic field act together on the KHI,the effect of thickness is more obvious when the magnetic field intensity is weak.The magnetic field transition layer destabilizes(enforces)the KHI,especially in the case of small thickness of the magnetic field transition layer.When considering the effect of magnetic field,the linear growth rate of KHI always decreases after reaching the maximum with the increase of total thickness.The stronger the magnetic field intensity is,the more obvious the growth rate decreases with the total thickness.Thus,it should be included in applications where the effect of fluid thickness on the KHI cannot be ignored,such as in double-cone ignition scheme for inertial confinement fusion.

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来源
《中国物理：英文版》 |2022年第12期|82-91|共10页
作者
戴鸿昊; 徐妙华; 郭宏宇; 李英骏; 张杰;
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作者单位

State Key Laboratory for Geomechanics and Deep Underground Engineering;

China University of Mining and Technology;

Beijing 100083;

China;

School of Science;

China University of Mining and Technology;

Beijing 100083;

China;

Double-cone Ignition(DCI)Joint Team;

China University of Mining and Technology;

Beijing 100083;

China;

Double-cone Ignition(DCI)Joint Team;

Beijing National Laboratory for Condensed Matter Physics;

Institute of Physics;

Chinese Academy of Sciences;

Beijing 100190;

China;

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原文格式 PDF
正文语种 chi
中图分类磁流体力学;
关键词
finite-thickness; Kelvin-Helmholtz instability; magnetohydrodynamic; inertial confinement fusion;

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Magnetohydrodynamic Kelvin-Helmholtz instability for finite-thickness fluid layers

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