Streamwise self-similarity and log scaling in turbulent boundary layers

Dixit, Shivsai Ajit and Ramesh, O N (2018) Streamwise self-similarity and log scaling in turbulent boundary layers. In: JOURNAL OF FLUID MECHANICS, 851 .

PDF Jou_Flu_Mec_851_2018.pdf - Published Version Restricted to Registered users only Download (745kB) | Request a copy

Abstract

High Reynolds number is thought to be a fundamental condition essential for the occurrence of log scaling in turbulent boundary layers. However, while log variation of mean velocity is seen to occur at moderate Reynolds numbers in the traditional boundary layer literature, log variations of higher-order moments are evident only at much higher Reynolds numbers, as reported in recent experiments. This observation suggests that, underlying the occurrence of log scaling in turbulent boundary layers, there exists a more fundamental condition (apart from the largeness of Reynolds number) - the requirement of self-similar evolution of a mean-flow quantity of interest along a mean-flow streamline, i.e. the mean advection of the scaled mean quantity of interest is required to be zero. Experimental data from the literature provide strong support for this proposal.

Item Type:	Journal Article
Publication:	JOURNAL OF FLUID MECHANICS
Publisher:	CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
Additional Information:	Copyright of this article belong to CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	09 Aug 2018 15:40
Last Modified:	09 Aug 2018 15:40
URI:	http://eprints.iisc.ac.in/id/eprint/60383

Actions (login required)

View Item