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مکانیک::
ریزمقیاس
Having begun to ponder the fine-scale structure of turbulence and having now temperature and velocity data available from the experiments with Uberoi, Corrsin turned his attention to the expected forms of the temperature two-point correlations and spectra in isotropic turbulence.
Following Kolmogorov's (1941) important theory of local isotropy and sim- ilarity hypotheses regarding turbulent velocity fine-structure, and in fact his own along with Obukhov's (1948) theory for fine-scale scalar fields (Corrsin, 1951b), Corrsin became interested in the intermittent behavior and the ge- ometric properties of fine-scale turbulence.
This led many to question Kolmogorov's original theory (see, for example, Landau and Lifshitz, 1959), which led to a number of attempts to address the structure of the fine-scales as well as modifications of Kolmogorov's theory.
In addition, Obukhov (1962) and Kolmogorov (1962), attempting to take the fine-scale in- termittency into account, assumed that the logarithm of the average energy dissipation rate over a very small volume had a normal distribution, and from this they were able to obtain modified expressions for the energy spectrum and structure functions.
Kuo (Kuo and Corrsin, 1971) in both grid-generated, nearly isotropic turbulence and on the axis of a round jet, Corrsin first addressed the size of the fine-scale regions, the dependence on Reynolds number, and the probability density of the locally averaged dissipation rate.
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