1982
DOI: 10.1017/s0022112082003450
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Local isotropy and anisotropy in a high-Reynolds-number turbulent boundary layer

Abstract: High-frequency fluctuations of temperature and of longitudinal and vertical velocity components have been measured with high-resolution probes in order to test the local-isotropy assumption. The simultaneous measurements of u’, w’, θ’ and the measurements in two space points with various separations in either the longitudinal or transverse directions were made in the large boundary layer (Rλ = 616) of the I.M.S.T. Air-Sea Interaction Simulation Tunnel. There is consistent evidence that the local-isotropy assum… Show more

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Cited by 157 publications
(110 citation statements)
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“…Anisotropic turbulence evolving in a flat-plate boundary layer was detailed by Mestayer [14], confirming that local isotropy exists in the dissipative range of scales, typically smaller than 20 times the Kolmogorov microscale. Local isotropy at small scales is generally accepted at sufficiently high Reynolds number, provided that an inertial subrange separates the energetic scales from the dissipative ones.…”
Section: Introductionmentioning
confidence: 78%
“…Anisotropic turbulence evolving in a flat-plate boundary layer was detailed by Mestayer [14], confirming that local isotropy exists in the dissipative range of scales, typically smaller than 20 times the Kolmogorov microscale. Local isotropy at small scales is generally accepted at sufficiently high Reynolds number, provided that an inertial subrange separates the energetic scales from the dissipative ones.…”
Section: Introductionmentioning
confidence: 78%
“…Predictions for the scaling of scalar gradient moments with the Péclet number are obtained by substituting r = η ∝ Pe −3/4 in the structure function expressions (5) and (7). It follows in particular that, in the presence of a large-scale gradient g, the skewness of the scalar gradient along this direction should decrease as Pe −1/2 .…”
Section: The Classical Theory Of Scalar Turbulencementioning
confidence: 99%
“…Propagation phenomena of light beams and radio waves in the atmosphere are for example strongly influenced both by the magnitude and the spatial distribution of small-scale temperature gradients [2]. Their dynamical properties have been a subject of very accurate experimental investigations carried out in the last few years both in the atmosphere [2,3], in the ocean [4,5] and for laboratory turbulent flow [6][7][8][9]. A striking feature of all these situations is the presence of fronts (also called sheets or cliffs).…”
Section: Introductionmentioning
confidence: 99%
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“…Yet, questions remain and laboratory experiments in a single facility in which the boundary conditions are well controlled are few. Using an inertial-subrange scaling that enables use of a linear ordinate, Saddoughi & Veeravalli (1994) were able to show that the inertial subrange and local isotropy do not necessarily coincide -see also Mestayer (1982). Of the two decades exhibiting a -5/3 slope on log-log axes, only the higher one had a spectral shear correlation coefficient approaching zero.…”
Section: Introductionmentioning
confidence: 99%