Issue |
Europhys. Lett.
Volume 43, Number 3, August I 1998
|
|
---|---|---|
Page(s) | 277 - 283 | |
Section | Classical areas of phenomenology | |
DOI | https://doi.org/10.1209/epl/i1998-00353-8 | |
Published online | 01 September 2002 |
Dissipative scaling functions in Navier-Stokes turbulence: Experimental tests
Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
Received:
13
January
1998
Accepted:
11
June
1998
A recent theoretical development in
the understanding of the small-scale structure of Navier-Stokes
turbulence has
been the proposition that the scales that separate inertial from
viscous behavior of many-point correlation functions
depend on the order n and on the typical
separations R of points in the correlation. This is of
fundamental significance in itself but it also has implications for the
scaling behaviour of various correlation functions.
This dependence has never been observed directly in laboratory experiments.
In order to observe it, turbulence data which both display a well-developed
scaling range with clean scaling behaviour and are well-resolved in
the small scales to well within the viscous range is required.
The data of the experiments performed in the
laboratory of P. Tabeling of Navier-Stokes turbulence in a helium
cell with counter-rotating disks approach
these criteria, and provide supporting evidence for the
existence of the predicted scaling of the viscous scale.
PACS: 47.27.Gs – Isotropic turbulence; homogeneous turbulence / 47.27.Jv – High-Reynolds-number turbulence / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1998
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