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

Abstract

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 non-intrusive simultaneous measurement of the velocity at spatially separated points. The breakdown of Taylor's hypothesis is quantified using the cross correlation between two points displaced in both space and time; correlation is better than 90% for scales less than the integral scale. A quantitative study of the decorrelation beyond the integral scale is presented, including an analysis of the failure of Taylor's hypothesis using techniques from predictability studies of turbulent flows. Our results are compared with similar studies of 3D turbulence.

27 pages, + 19 figures

References in corpus (1)

• Vorticity statistics in the two-dimensional enstrophy cascade

Cited by in corpus (8)

• Macroscopic effects of the spectral structure in turbulent flows
• Information Content of Turbulence
• Intermittency in 2D soap film turbulence
• Statistical properties of two-dimensional elastic turbulence
• Asymptotic turbulent friction in 2D rough-walled flows
• On the applicability of Taylor's hypothesis in streaming magnetohydrodynamic turbulence
• Janus spectra in two-dimensional flows
• The broken link between space and time in elastic turbulence