Absolute and convective instabilities in an inviscid compressible mixxing layer
Absolute and convective instabilities in an inviscid compressible mixxing layer
复制标题
无粘性可压缩混合层中的绝对和对流不稳定性
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. S. Ruderman
中科院分区：
文献类型：
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作者：
Philippe Caillol;M. S. Ruderman
本文研究分离两股不同速度和温度的流体的可压缩剪切流的稳定性。混合层中的速度和温度分布是双曲切线。流场稳定性的简正模态分析归结为压力扰动的特征值问题。我们简要地描述了我们用来解决这个问题的数值方法。然后，我们引入了绝对和对流不稳定性的概念，并研究了马赫数的影响，以及对流和绝对不稳定性之间的过渡的每个流的速度和温度比。最后，我们讨论了本文结果对日球顶稳定性的意义。
We consider the stability of a compressible shear flow separa ting two streams of different speeds and temperatures. The velocity and temperature profiles in this mixing layer are hy perbolic tangents. The normal mode analysis of the flow stability reduces to an eigenvalue problem for the pressure perturbation. We briefly describe the numerical method that we used to solve this problem. Then, we introduce the notions of the absolute and convective instabilities and examine the effects of Mach number, and the velocity and temperature ratios of each stream on the transition between convective and absolute instabilities. Finally, we discuss the implicati on of the results presented in this paper for the heliopause s tability.