Author(s): Enzo Levi

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Abstract: Turbulent eddies created inside wall region are assumed to be wake trails shed by low-speed fluid tongues ejected out of viscous sublayer. The assumption is corroborated by experimental evidences. As a result, it is shown that there are three kinds of those eddies: streamwise eddies, undulated eddies and annular eddies. Their properties are described. An application of those concepts to a comparison between the behaviour of Newtonian and drag-reducing flows permits to appreciate the usefulness of the proposed model for a deterministic approach to the forecasting of the structure of turbulent flows.

DOI: https://doi.org/10.1080/00221687809499624

Year: 1978