| 用子波变换研究壁湍流Lipschitz奇异性指数 |
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| 引用本文： | 姜楠,王振东.用子波变换研究壁湍流Lipschitz奇异性指数[J].应用数学和力学,1998,19(10):907-913. |
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| 作者姓名： | 姜楠 王振东 |
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| 作者单位： | 天津大学力学系，中国科学院力学研究所非线性连续介质力学开放研究实验室 |
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| 摘 要： | 本文用子波变换研究了描述壁湍流脉动速度局部奇异性行为的Ｌｉｐｓｃｈｉｔｚ奇异性指数，发现在湍流边界层中，猝发和扫掠发生时脉动速度信号的Ｌｉｐｓｃｈｉｔｚ局部奇异性指数为负值·
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| 关 键 词： | 子波变换 相干结构 Lipschitz局部奇异性指数 |
Using Wavelet Transform to Study the Lipschitz Local Singular Exponent in Wall Turbulence |
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| Jiang Nan,Wang Zhendong,Shu Wei.Using Wavelet Transform to Study the Lipschitz Local Singular Exponent in Wall Turbulence[J].Applied Mathematics and Mechanics,1998,19(10):907-913. |
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| Authors: | Jiang Nan Wang Zhendong Shu Wei |
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| Abstract: | In this paper, wavelet transform is introduced to study the Lipschitz local singular exponent for characterizing the local singularity behavior of fluctuating velocity in wall turbulence. It is found that the local singular exponent is negative when the ejections and sweeps of coherent structures occur in a turbulent boundary layer. |
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| Keywords: | wavelet transform coherent structure Lipschitz local singular exponent |
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