Experimental study of Taylor's hypothesis in a turbulent soap film

被引：23

作者：

Belmonte, A ^{[1
]}

Martin, B ^{[1
]}

Goldburg, WI ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

PHYSICS OF FLUIDS | 2000年 / 12卷 / 04期

关键词：

D O I：

10.1063/1.870339

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An experimental study of Taylor's hypothesis in a quasi-two-dimensional turbulent soap film is presented. A two-probe laser Doppler velocimeter enables a nonintrusive simultaneous measurement of the velocity at spatially separated points. Using the cross correlation between a pair of points displaced in both space and time, the velocity coherence is measured to be better than 90% for scales less than the integral scale. Taylor's hypothesis is confirmed insofar as the lower moments of the longitudinal velocity difference are equal whether measured with or without invoking the hypothesis. A quantitative study of the decorrelation beyond the integral scale is also presented. (C) 2000 American Institute of Physics. [S1070-6631(00)02103-6].

引用

页码：835 / 845

页数：11

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