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Experimental investigation of turbulent boundary layer developing along a streamwise external corner (chine)

Moinuddin, Khalid A. M and Joubert, P. N and Chong, M. S and Hafez, S (2003) Experimental investigation of turbulent boundary layer developing along a streamwise external corner (chine). Experimental thermal and fluid science, 27 (5). pp. 599-609. ISSN 0894-1777

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Abstract

Turbulent viscous fluid flow is always accompanied by a secondary flow if the flow is not exactly two-dimensional or exactly axisymmetric. The classic example is duct flow, where counter-rotating pairs of vortices appear in each corner, distorting the isoaxialvelocity contours. The present investigation of the turbulent boundary-layer development along a streamwise external corner (chine) also shows distortion of the isoaxialvelocity contours which predicts the presence of a pair of counter-rotating vortices. These vortices or secondary flow are induced by inequality of Reynolds stresses around the corner. The direct effect of this corner flow is to increase the drag force. A series of experimental investigations at the University of Melbourne provided, in qualitative terms, the general behaviour expected from this class of flow as revealed by Elder [J. Fluid Mech. 9 (1960) 133] and Xu and Pollard [Phys. Fluids 13 (2001) 3321]. This flow is also expected to exhibit symmetry about the corner bisector. Our measurements indicate quasi-symmetry about the bisector all along the corner.

Item Type: Article
Uncontrolled Keywords: boundary-layer, turbulence, secondary flow, drag, vortices, streamwise corner, complex flow, three-dimensional flow
Subjects: RFCD Classification > 290000 Engineering and Technology
Faculty/School/Research Centre/Department > School of Engineering and Science
Depositing User: Ms Phung T Tran
Date Deposited: 12 Oct 2010 05:27
Last Modified: 15 Oct 2010 22:10
URI: http://vuir.vu.edu.au/id/eprint/1887
DOI: 10.1016/S0894-1777(02)00274-1
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Citations in Scopus: 4 - View on Scopus

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