Theoretical Approaches to Interstellar Turbulence
Theoretical Approaches to Interstellar Turbulence
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星际湍流的理论方法
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
J. Scalo
中科院分区：
文献类型：
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作者：
J. Scalo
星际介质的性质强烈表明，它是湍流的，在广义上的非线性系统，表现出不可预测的时间行为，伴随着自组织的空间波动，覆盖了广泛的尺寸尺度。本文回顾了一些理论的方法来解决这个问题。这些措施包括现象学模型，旨在解释所观察到的尺度关系和维里化约束，直接数值解的流体动力学方程，统计湍流封闭方法的应用，并建议极限环和混沌行为的局部模型方程的解决方案。
The properties of the interstellar medium strongly suggest that it is turbulent, in the generalized sense of nonlinear systems which exhibit unpredictable temporal behavior accompanied by self-organizing spatial fluctuations covering a wide range of size scales. This paper reviews a number of theoretical approaches to the problem. These include phenomenological models designed to explain the observed scaling relations and virialization constraints, direct numerical solutions of the hydrodynamical equations, applications of statistical turbulence closure methods, and solutions of local model equations which suggest limit cycle and chaotic behavior.