Thermal instability of two-dimensional stagnation-point boundary layers
Thermal instability of two-dimensional stagnation-point boundary layers
复制标题
二维驻点边界层的热不稳定性
DOI：
10.1017/s0022112083001469
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发表时间：
1983
影响因子：
3.7
通讯作者：
C. Sohn
中科院分区：
文献类型：
--
作者：
K. Chen;M. M. Chen;C. Sohn
本文研究了普朗特数在0.7 ~∞范围内二维停滞流动的热不稳定性。由于既没有采用边界层近似，也没有采用平行流假设，分析结果是精确解。特别令人感兴趣的是，在研究的普朗特数范围内，临界瑞利数和临界波数被发现对普朗特数相对不敏感，而临界瑞利数和临界波数是基于热边界层长度尺度定义的。
A study of thermal instability for the two-dimensional stagnation flow for Prandtl numbers ranging from 0.7 to infinity is presented. The analysis represents an exact solution since neither the boundary-layer approximation nor the parallel-flow assumption was invoked. Of particular interest is that the critical Rayleigh number and the critical wavenumber, when defined on the basis of the thermal boundary-layer lengthscale, are found to be relatively insensitive to the Prandtl number for the range of Prandtl numbers studied.