Estimating wall-shear-stress fluctuations given an outer region input
Estimating wall-shear-stress fluctuations given an outer region input
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DOI：
10.1017/jfm.2012.508
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发表时间：
2013-01-25
影响因子：
3.7
通讯作者：
Hutchins, Nicholas
中科院分区：
文献类型：
--
作者：
Mathis, Romain;Marusic, Ivan;Hutchins, Nicholas
本文提出了一个零压力梯度湍流边界层瞬时壁面剪应力分布模型。该模型基于经验和理论考虑，能够仅使用远离壁的对数区域中测得的流向速度的低频内容来重建具有统计代表性的波动壁面剪应力时间序列i '（w）（t）。结果，包括频谱和二阶矩，表明该模型能够成功地捕捉雷诺数的趋势，在其他研究中观察到的。
A model for the instantaneous wall-shear-stress distribution is presented for zero-pressure-gradient turbulent boundary layers. The model, based on empirical and theoretical considerations, is able to reconstruct a statistically representative fluctuating wall-shear-stress time-series, iota'(w)(t), using only the low-frequency content of the streamwise velocity measured in the logarithmic region, away from the wall. Results, including spectra and second-order moments, show that the model is capable of successfully capturing Reynolds number trends as observed in other studies.