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Revisiting the Effects of Compressibility on the Rayleigh-Taylor Instability

机译:回顾可压缩性对瑞利泰勒不稳定性的影响

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摘要

The effects of compressibility on the Ray leigh-Taylor instability (RTI) are investigated. It is shown that the controversy over compressibility effects in the previous studies is due to improper comparison, in which the density varying effect obscures the real role of compressibility. After eliminating the density varying effect, it is found that the compressibility destabilizes RTI in both the cases of constant density and exponentially varying density when M 1. This destabilizing effect is more important at smaller values of the Atwood number A_T or greater values of gravity g, and the increment in the growth rate produced by compressibility depends inversely on the pressure p or the ratio of specific heat Γ.
机译:研究了可压缩性对Ray leigh-Taylor不稳定性(RTI)的影响。结果表明,先前研究中关于可压缩性影响的争论是由于不恰当的比较而引起的,其中密度变化效应掩盖了可压缩性的真正作用。消除密度变化效应后,发现当M 1时,在恒定密度和指数变化密度的情况下,可压缩性都会使RTI不稳定。在较小的Atwood值A_T或较大的Atwood值时,这种稳定作用更为重要。重力g和可压缩性产生的增长率的增加反过来取决于压力p或比热Γ的比值。

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