圆柱切向间断的稳定性及螺旋波的产生和阻尼
On the Stability of Cylindrical Tangential Discontinuity, Generation and Damping of Helical Waves
摘要：
在线性近似下，研究了两种理想不可压缩流体（包括磁场、表面张力和引力场）之间圆柱形界面的稳定性。我们发现，螺旋波出现在等离子体彗星尾巴和垂直圆柱形水射流在空气中的描述由相同的色散方程的彗星尾巴磁场起着相同的稳定作用的表面张力的水射流。因此，它们代表了开尔文-亥姆霍兹不稳定性的相同现象。这样，就可以在实验室里模拟出彗星尾部和天体物理喷流中的螺旋波。证明了开尔文不稳定阻尼的共振性质.
英文摘要：
Stability of cylindrical interface between two ideal incompressible fluids, including the magnetic field, surface tension and gravitational field is studied in linear approximation. We found that helical waves arising both in plasma comet tails and on the vertical cylindrical water jet in the air are described by the same dispersion equation where the comet tail magnetic field plays the same stabilizing role as surface tension for water jet. Hence they represent the same phenomenon of Kelvin-Helmholtz instability. Thus helical waves in comet tails and astrophysical jets may be simulated in the laboratory. The resonance nature of the Kelvin- instability damping is demonstrated.
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