Abstract
The most elementary structures of turbulence, i.e., vortex tubes, are studied using laboratory velocity data for boundary layers with Reynolds numbersReλ = 295– 1258. We conduct conditional averaging for enhancements of a small-scale velocity increment and obtain the typical velocity profile for vortex tubes. Their radii are of the order of the Kolmogorov length. Their circulation velocities are of the order of the root-mean-square velocity fluctuation. These properties are independent of the Reynolds number and are hence expected to be universal.
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References
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Mouri, H., Hori, A., Kawashima, Y. (2006). VORTEX TUBES IN VELOCITY FIELDS OF LABORATORY TURBULENCE AT HIGH REYNOLDS NUMBERS. In: KIDA, S. (eds) IUTAM Symposium on Elementary Vortices and Coherent Structures: Significance in Turbulence Dynamics. Fluid Mechanics and Its Applications, vol 79. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4181-0_10
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DOI: https://doi.org/10.1007/1-4020-4181-0_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4180-8
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