Direct Measurement of Turbulent Shear

Details Direct Measurement of Turbulent Shear Direct Measurement of Turbulent Shear

2010-09-13

arxiv.org/abs/1009.2462v2

Physica D 240, 1873 (2011)

Physics

Fluid Dynamics

Scientific paper

10.1016/j.physd.2011.08.012

A photon correlation method is introduced for measuring components of the shear rate tensor in a turbulent soap film. This new scheme, which is also applicable to three-dimensional flows, is shown to give the same results as Laser Doppler velocimetry, but with less statistical noise. The technique yields the mean shear rate s, its standard deviation, and a simple mathematical transform of the probability density function P(s) of the shear rate itself.

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