Experimental Evidence of the Kraichnan Scalar Spectrum at High Reynolds Numbers

被引：25

作者：

Bogucki, D. J. ^{[1
]}

Luo, H.

Domaradzki, J. A. ^{[2
]}

机构：

[1] Texas A&M Univ, Dept Phys & Environm Sci, Unit 5892, Corpus Christi, TX 78412 USA

[2] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA USA

来源：

JOURNAL OF PHYSICAL OCEANOGRAPHY | 2012年 / 42卷 / 10期

关键词：

BATCHELOR SPECTRUM; DYNAMIC-RESPONSE; PASSIVE SCALARS; DISSIPATION; TEMPERATURE; TURBULENCE; FIELD; SIMULATIONS; DIFFUSION; ENERGY;

D O I：

10.1175/JPO-D-11-0214.1

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Measurements of horizontal temperature gradient spectra were carried out in a 25 m X 12 m X 3 m freshwater well mixed swimming pool. The associated flow Reynolds number was found to vary from 4 X 10(3) to 6 x 10(3). In all analyzed cases, at large wavenumbers k, the temperature gradient spectra exhibited behavior consistent with the Kraichnan spectral form: similar to exp[- (6q(k))(1/2)k] with constant q(K) approximate to 5.26. The measurements are in agreement with direct numerical simulations of a passive scalar flow with Pr approximate to 7 of Bogucki et al. and with recent experimental observations of Sanchez et al.

引用

页码：1717 / 1728

页数：12

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