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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

UNIVERSALITY OF TEMPERATURE STATISTICS IN STABLY STRATIFIED TURBULENCE

pages 77-82
DOI: 10.1615/TSFP2.1760
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摘要

Using two dimensional direct numerical simulations, the statistics of the temperature fluctuations in stably stratified turbulence are studied. Comparison with passive scalar statistics in similar flows suggest that the stably stratified case is qualitatively similar to the passive case. A stratification-dependent mixing length is shown to be the dominant factor in determining rare event temperature statistics. Probability density functions at various stratification strengths collapse to the same functional form as in the passive case when rescaled using this length scale.

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