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Articles

Conditional statistics of Reynolds shear stress over obstacle marks

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Pages 305-315 | Received 31 Dec 2013, Accepted 01 Apr 2013, Published online: 26 Jul 2013
 

Abstract

The purpose of the present paper is to investigate the contribution of stress fractions to the Reynolds shear stress corresponding to each quadrant event across the scour mark around the static short cylinder placed over a sand bed transverse to the flow. The distributions of mean-time fraction, probabilities of occurrence of turbulent events, and the probability densities of streamwise and vertical velocity components over and within scour mark at different longitudinal locations are presented. The probability density distributions of streamwise and vertical velocity components are verified with present experimental data for the plane surface as well as in the scour mark and the results are found in good agreement with a little discrepancy within the scour mark.

Acknowledgment

This article belongs to selected papers presented at the ‘Hydro-2012’ conference held at IIT Bombay on 7–8 December 2012 and shortlisted by Editor for publication in this Journal after re-review and revisions where necessary. . Authors wish to express their sincere thanks to Prof. M. C. Deo of IIT, Bombay for providing the extra time to revise the paper for the journal publication.

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