Abstract
We analyze the structure of the events associated to the high velocity gradients in a series of experiments performed in low temperature helium, between counter-rotating disks, and in which the local velocity is measured by using hot wire anemometry. Such events are interpreted as resulting from the sweeping of vorticity filaments (identified as worms in a previous study [1]) onto the hot wire. Several characteristics of the worms (mean shape, size, internal increment, and density) are analyzed, in a range of microscale Reynolds numbers Rλ comprised between 150 and 2300.
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Belin, F., Moisy, F., Tabeling, P., Willaime, H. (1999). Worms in a turbulence experiment, from hot wire time series. In: Gyr, A., Kinzelbach, W., Tsinober, A. (eds) Fundamental Problematic Issues in Turbulence. Trends in Mathematics. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8689-5_14
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DOI: https://doi.org/10.1007/978-3-0348-8689-5_14
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-9730-3
Online ISBN: 978-3-0348-8689-5
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