Abstract
We analyze turbulent velocity signals in the atmospheric surface layer, obtained by pairs of probes separated by inertial-range distances parallel to the ground and (nominally) orthogonal to the mean wind. The Taylor microscale Reynolds number ranges up to 20000. Choosing a suitable coordinate system with respect to the mean wind, we derive theoretical forms for second order structure functions and fit them to experimental data. The effect of flow anisotropy is small for the longitudinal component but significant for the transverse component. The data provide an estimate for a universal exponent from among a hierarchy that governs the decay of flow anisotropy with the scale size.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5330-5333 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 81 |
| Issue number | 24 |
| State | Published - Dec 14 1998 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Extraction of anisotropic contributions in turbulent flows. / Arad, Itai; Dhruva, Brindesh; Kurien, Susan; L'vov, Victor S.; Procaccia, Itamar; Sreenivasan, K. R.
In: Physical Review Letters, Vol. 81, No. 24, 14.12.1998, p. 5330-5333.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Extraction of anisotropic contributions in turbulent flows
AU - Arad, Itai
AU - Dhruva, Brindesh
AU - Kurien, Susan
AU - L'vov, Victor S.
AU - Procaccia, Itamar
AU - Sreenivasan, K. R.
PY - 1998/12/14
Y1 - 1998/12/14
N2 - We analyze turbulent velocity signals in the atmospheric surface layer, obtained by pairs of probes separated by inertial-range distances parallel to the ground and (nominally) orthogonal to the mean wind. The Taylor microscale Reynolds number ranges up to 20000. Choosing a suitable coordinate system with respect to the mean wind, we derive theoretical forms for second order structure functions and fit them to experimental data. The effect of flow anisotropy is small for the longitudinal component but significant for the transverse component. The data provide an estimate for a universal exponent from among a hierarchy that governs the decay of flow anisotropy with the scale size.
AB - We analyze turbulent velocity signals in the atmospheric surface layer, obtained by pairs of probes separated by inertial-range distances parallel to the ground and (nominally) orthogonal to the mean wind. The Taylor microscale Reynolds number ranges up to 20000. Choosing a suitable coordinate system with respect to the mean wind, we derive theoretical forms for second order structure functions and fit them to experimental data. The effect of flow anisotropy is small for the longitudinal component but significant for the transverse component. The data provide an estimate for a universal exponent from among a hierarchy that governs the decay of flow anisotropy with the scale size.
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M3 - Article
VL - 81
SP - 5330
EP - 5333
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
ER -