### 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)

### Cite this

*Physical Review Letters*,

*81*(24), 5330-5333.

**Extraction of anisotropic contributions in turbulent flows.** / Arad, Itai; Dhruva, Brindesh; Kurien, Susan; L'vov, Victor S.; Procaccia, Itamar; Sreenivasan, K. R.

Research output: Contribution to journal › Article

*Physical Review Letters*, vol. 81, no. 24, pp. 5330-5333.

}

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.

UR - http://www.scopus.com/inward/record.url?scp=0001281894&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001281894&partnerID=8YFLogxK

M3 - Article

VL - 81

SP - 5330

EP - 5333

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 24

ER -