Measurements of the Kolmogorov constant and intermittency exponent at very high Reynolds numbers

• Alexander Praskovsky

  Atmospheric Technology Division, National Center for Atmospheric Research, Boulder, Colorado 80307-3000

• Steven Oncley

  Atmospheric Technology Division, National Center for Atmospheric Research, Boulder, Colorado 80307-3000

抄録

Characteristics of turbulence in the inertial range are experimentally studied in the atmospheric surface layer over the range of the Taylor microscale based Reynolds number Rλ≊(2.8–12.7)×103 and in a large wind tunnel (in a mixing layer at Rλ≊2.0×103 and a return channel at Rλ≊3.2×103). The intermittency exponent μ, estimated from the correlation function of energy dissipation Rεε(r)=〈ε(x)ε(x+r)〉∝r−μ, is found to be independent of Reynolds number and approximately equal to 0.20. No ‘‘measurable’’ deviation from the −5/3 exponent in the ‘‘five-thirds’’ law is found. On the other hand, the Kolmogorov constant C in this law is found to be weakly dependent on Rλ. This dependence is well described by the power law C∝R−μ/2λ≊R−0.10λ at μ≊0.20.

収録刊行物

• Physics of Fluids

  Physics of Fluids 6 (9), 2886-2888, 1994-09-01

  AIP Publishing

キーワード

• Condensed Matter Physics
• Fluid Flow and Transfer Processes
• Mechanics of Materials
• Computational Mechanics
• Mechanical Engineering

詳細情報

• CRID: 1360574096205558400
• NII論文ID: 30015735271
• NII書誌ID: AA10676668
• DOI: 10.1063/1.868435
• ISSN: 10897666
• ISSN: 10706631
• Web Site: https://pubs.aip.org/aip/pof/article-pdf/6/9/2886/19158822/2886_1_online.pdf
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