Statistical properties of energy dissipation

✍ Scribed by C. Freytag

• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 696 KB
• Volume: 14
• Category: Article
• ISSN: 0006-8314
• DOI: 10.1007/bf00122618

✦ Synopsis

In previous experimental investigations of the hypothesis of a lognormal distribution of kinetic-energy dissipation proposed by Kolmogorov and Obukhov in 1962, approximations for the dissipation of kinetic energy were used.

By using special measuring equipment, these approximations could be avoided and dissipation could be measured directly, permitting computation of structure functions, probability densities and dissipation spectra. As a result, the predictions of the lognormal hypothesis (LNH) have been confirmed. A great part of the deviations reported elsewhere could be explained as resulting from the use of approximations. The universal parameter of the LNH could be evaluated in different ways, yielding: b = 0.5 (from structure functions of U) and p = 0.47 (from dissipation spectra).