A note on turbulent spots over a rough bed in wave boundary layers

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    Abstract

    This study is a continuation of the investigation of turbulent spots in wave boundary layers over a smooth wall reported by Carstensen et al. [J. Fluid Mech. 646, 169–206 (2010)]. The present paper summarises the results of an experimental investigation of turbulent spots in wave boundary layers over a rough wall. Two kinds of experiments were made: flow visualization tests and velocity profile measurements. The experiments show that turbulent spots as observed in the smooth-wall wave boundary layers are present irrespective of wall roughness conditions. As in the smooth-wall case the turbulent spots over the rough wall appear locally in time and space and grow in size as time progresses.
    Original languageEnglish
    JournalPhysics of Fluids
    Volume24
    Pages (from-to)Paper 115104
    Number of pages13
    ISSN1070-6631
    DOIs
    Publication statusPublished - 2012

    Bibliographical note

    © 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Phys. Fluids 24, 115104 (2012) and may be found at http://pof.aip.org/resource/1/phfle6/v24/i11/p115104_s1?ver=pdfcov

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