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Experimental study of the Kolmogorov refined similarity variable |
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| Authors: | I. Hosokawa C.W. Van Atta S.T. Thoroddsen |
| Affiliation: | aUniversity of Electro-Communications, Chofu, Tokyo 182, Japan bApplied Mechanics and Engineering Sciences, 0411 University of California, San Diego, La Jolla, CA 92093, USA |
| Abstract: | Recently Thoroddsen and Van Atta (1992, Phys. Fluids A4, 2592) showed that Kolmogorov's refined similarity hypothesis (1962, J. Fluid Mech. 13, 77; 82) is supported by experimental data from a wind-tunnel study of a cylinder wake, at Reλ of 550. We show here that the probability density of the Kolmogorov similarity variable approaches a Gaussian distribution. The data also suggest that it may obey an even more demanding conditional similarity, which leads to important conclusions regarding the scaling exponents. |
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