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TECHNICAL PAPERS

Surface Roughness Effects on Turbulent Boundary Layer Structures

[+] Author and Article Information
L. Keirsbulck, L. Labraga, A. Mazouz, C. Tournier

Laboratoire de Mécanique et d’Energétique, Université de Valenciennes et du Hainaut Cambrésis, le Mont Houy, B.P.311, 59304 Valenciennes, Cedex France

J. Fluids Eng 124(1), 127-135 (Oct 15, 2001) (9 pages) doi:10.1115/1.1445141 History: Received June 05, 2000; Revised October 15, 2001
Copyright © 2002 by ASME
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References

Figures

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Two-dimensional roughness geometry
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Mean velocity profiles. Smooth-wall: ▵, Reθ=8405. Rough-wall: ▴, Reθ=8549.
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Reynolds stresses distributions on smooth and rough walls boundary layers. The same symbols as Fig. 2 for the present measurements. Smooth-wall: □, Reθ=9630 (Krogstad et al. 3). Rough-wall: ▪, Reθ=13040 (Antonia and Krogstad 18).
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Profiles of skewness of u and v in outer-law scaling for both smooth and rough walls’ boundary layers. Symbols are same as that of Fig. 2.
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Vertical and longitudinal turbulent flux of the shear stress for both smooth-wall and rough-wall boundary layers. Symbols are same as that of Fig. 2. ⋄ Smooth-wall; Solid line Reθ=4750 (Bandyopadhyay and Watson 1). ♦ Rough-wall (Bandyopadhyay and Watson 1)
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Production and dissipation on smooth- and rough-wall. Smooth-wall: open symbols; rough-wall: filled symbols.
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Turbulent kinetic energy budget. Smooth-wall: open symbols; rough-wall: filled symbol.
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Schematic of quadrant decomposition
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Shear stress contributions from quadrants Q2 and Q4 for H=0 on smooth- and rough-wall. Symbols are same as in Fig. 2.
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Shear stress contribution from quadrants Q2 and Q4 for H=5 on smooth and rough wall
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Ratio of contributions to uv from quadrants Q2 and Q4 for H=0 and H=5
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Fluctuating velocity field on smooth and rough walls

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