This study presents experimental results on the effects of riblets on the coherent structures of turbulence within a turbulent spot. The riblet spacings of the study correspond to 0.5 and 1.5 times the natural spacing of the low-speed streak. The cross-sectional dimensions of the riblets were chosen to control the spatial distribution of wave packets consisting of streamwise-aligned hairpin vortices. Both riblet spacings demonstrated effective control on the spanwise positioning of the wave packets. The wider-spaced riblets reduced spanwise mutual interaction between wave packets. The closer-spaced riblets promoted this interaction via spanwise-oriented vortical structures which produced stronger turbulent fluctuations.
Issue Section:
Fundamental Issues and Canonical Flows
References
1.
Bushnell
, D. M.
, and McGinley
, C. B.
, 1989
, “Turbulence Control in Wall Flows
,” Annu. Rev. Fluid Mech.
, 21
(1
), pp. 1
–20
.2.
Bushnell
, D.
, 2003
, “Aircraft Drag Reduction—A Review
,” Proc. Inst. Mech. Eng., Part G
, 217
(1
), pp. 1
–18
.3.
Perry
, A.
, Lim
, T.
, and Teh
, E.
, 1981
, “A Visual Study of Turbulent Spots
,” J. Fluid Mech.
, 104
, pp. 387
–405
.4.
Schröder
, A.
, and Kompenhans
, J.
, 2004
, “Investigation of a Turbulent Spot Using Multi-Plane Stereo Particle Image Velocimetry
,” Exp. Fluids
, 36
(1
), pp. 82
–90
.5.
Yaras
, M.
, 2007
, “An Experimental Study of Artificially-Generated Turbulent Spots Under Strong Favorable Pressure Gradients and Freestream Turbulence
,” ASME J. Fluids Eng.
, 129
(5
), pp. 563
–572
.6.
Singer
, B.
, and Joslin
, R.
, 1994
, “Metamorphosis of a Hairpin Vortex Into a Young Turbulent Spot
,” Phys. Fluids
, 6
(11
), pp. 3724
–3736
.7.
Brinkerhoff
, J.
, and Yaras
, M.
, 2014
, “Numerical Investigation of the Generation and Growth of Coherent Flow Structures in a Triggered Turbulent Spot
,” J. Fluid Mech.
, 759
, pp. 257
–294
.8.
Zhou
, J.
, Adrian
, R.
, Balachandar
, S.
, and Kendall
, T.
, 1999
, “Mechanisms for Generating Coherent Packets of Hairpin Vortices in Channel Flow
,” J. Fluid Mech.
, 387
, pp. 353
–396
.9.
Adrian
, R.
, Meinhart
, C.
, and Tomkins
, C.
, 2000
, “Vortex Organization in the Outer Region of the Turbulent Boundary Layer
,” J. Fluid Mech.
, 422
, pp. 1
–54
.10.
Tomkins
, C.
, and Adrian
, R.
, 2003
, “Spanwise Structure and Scale Growth in Turbulent Boundary Layers
,” J. Fluid Mech.
, 490
, pp. 37
–74
.11.
Smith
, C.
, and Metzler
, S.
, 1983
, “The Characteristics of Low-Speed Streaks in the Near-Wall Region of a Turbulent Boundary Layer
,” J. Fluid Mech.
, 129
, pp. 27
–54
.12.
Kline
, S.
, Reynolds
, W.
, Schraub
, F.
, and Runstadler
, P.
, 1967
, “The Structure of Turbulent Boundary Layers
,” J. Fluid Mech.
, 30
(4
), pp. 741
–773
.13.
Butler
, K.
, and Farrell
, B.
, 1993
, “Optimal Perturbations and Streak Spacing in Wall-Bounded Turbulent Shear Flow
,” Phys. Fluids
, 5
(3
), pp. 774
–777
.14.
Baig
, M.
, and Chernyshenko
, S.
, 2004
, “Regeneration Mechanism of Streaks in Near-Wall Quasi-2D Turbulence
,” Eur. J. Mech. B/Fluids
, 23
(5
), pp. 727
–736
.15.
Asai
, M.
, Minagawa
, M.
, and Nishioka
, M.
, 2002
, “The Instability and Breakdown of a Near-Wall Low-Speed Streak
,” J. Fluid Mech.
, 455
, pp. 289
–314
.16.
Piomelli
, U.
, Balaras
, E.
, and Pascarelli
, A.
, 2000
, “Turbulent Structures in Accelerating Boundary Layers
,” J. Turbul.
, 1
(1
), pp. 1
–16
.17.
Piomelli
, U.
, and Yuan
, J.
, 2013
, “Numerical Simulations of Spatially Developing, Accelerating Boundary Layers
,” Phys. Fluids
, 25
(10
), p. 101304
.18.
Bechert
, D.
, Bruse
, M.
, Hage
, W.
, der Hoeven
, J. V.
, and Hoppe
, G.
, 1997
, “Experiments on Drag-Reducing Surfaces and Their Optimization With an Adjustable Geometry
,” J. Fluid Mech.
, 338
, pp. 59
–87
.19.
Goldstein
, D.
, Handler
, R.
, and Sirovich
, L.
, 1995
, “Direct Numerical Simulation of Turbulent Flow Over a Modelled Riblet Covered Surface
,” J. Fluid Mech.
, 302
, pp. 333
–376
.20.
Garcia-Mayoral
, R.
, and Jimenez
, J.
, 2011
, “Hydrodynamic Stability and Breakdown of the Viscous Regime Over Riblets
,” J. Fluid Mech.
, 678
, pp. 317
–347
.21.
Choi
, H.
, Moin
, P.
, and Kim
, J.
, 1993
, “Direct Numerical Simulation of Turbulent Flow Over Riblets
,” J. Fluid Mech.
, 255
, pp. 503
–539
.22.
Lee
, S.
, and Lee
, S.
, 2001
, “Flow Field Analysis of a Turbulent Boundary Layer Over a Riblet Surface
,” Exp. Fluids
, 30
(2
), pp. 153
–166
.23.
Klumpp
, S.
, Meinke
, M.
, and Schroder
, W.
, 2010
, “Numerical Simulation of Riblet Controlled Spatial Transition in a Zero-Pressure-Gradient Boundary Layer
,” Flow, Turbul. Combust.
, 85
(1
), pp. 57
–71
.24.
Ma
, H.
, Tian
, Q.
, and Wu
, H.
, 2005
, “Experimental Study of Turbulent Boundary Layers on Groove/Smooth Flat Surfaces
,” J. Therm. Sci.
, 14
(3
), pp. 193
–197
.25.
Litvinenko
, Y.
, Chernoray
, V.
, Kozlov
, V.
, Loefdahl
, L.
, Grek
, G.
, and Chun
, H.
, 2006
, “The Influence of Riblets on the Development of a Lambda Structure and Its Transformation Into a Turbulent Spot
,” Dokl. Phys.
, 51
(3
), pp. 144
–147
.26.
Chernorai
, V.
, Kozlov
, V.
, Loefdahl
, L.
, Grek
, G.
, and Chun
, H.
, 2006
, “Effect of Riblets on Nonlinear Disturbances in the Boundary Layer
,” Thermophys. Aeromech.
, 13
(1
), pp. 67
–74
.27.
Boiko
, A.
, 2007
, “Effect of Riblets on the Streaky Structures Excited by Free Stream Tip Vortices in Boundary Layer
,” J. Mech. Sci. Technol.
, 21
(1
), pp. 196
–206
.28.
Goldstein
, D.
, and Tuan
, T.
, 1998
, “Secondary Flow Induced by Riblets
,” J. Fluid Mech.
, 363
, pp. 115
–151
.29.
Garcia-Mayoral
, R.
, and Jimenez
, J.
, 2011
, “Drag Reduction by Riblets
,” Philos. Trans.: Math., Phys. Eng. Sci.
, 369
(1940
), pp. 1412
–1427
.30.
Suga
, K.
, Mori
, M.
, and Kaneda
, M.
, 2011
, “Vortex Structure of Turbulence Over Permeable Walls
,” Int. J. Heat Fluid Flow
, 32
(3
), pp. 586
–595
.31.
Lancey
, T.
, and Reidy
, L.
, 1989
, “Effects of Surface Riblets on the Reduction of Wall Pressure Fluctuations in Turbulent Boundary Layers
,” J. Acoust. Soc. Am.
, 85
(4
), pp. 1793
–1794
.32.
Keith
, W.
, 1989
, “Spectral Measurements of Pressure Fluctuations on Riblets
,” AIAA J.
, 27
(12
), pp. 1822
–1824
.33.
Stalio
, E.
, and Nobile
, E.
, 2003
, “Direct Numerical Simulation of Heat Transfer Over Riblets
,” Int. J. Heat Fluid Flow
, 24
(3
), pp. 356
–371
.34.
Bruun
, H.
, 1995
, Hot-Wire Anemometry Principles and Signal Analysis
, Oxford University Press
, Oxford, UK
.35.
Roberts
, S.
, and Yaras
, M.
, 2004
, “Boundary-Layer Transition Over Rough Surfaces With Elevated Free-Stream Turbulence
,” ASME
Paper No. GT2004-53668.36.
Narasimha
, R.
, 1985
, “The Laminar-Turbulent Transition Zone in the Boundary Layer
,” Prog. Aerosp. Sci.
, 22
(1
), pp. 29
–80
.37.
Gostelow
, J.
, Melwani
, N.
, and Walker
, G.
, 1996
, “Effects of Streamwise Pressure Gradient on Turbulent Spot Development
,” ASME J. Turbomach.
, 118
(4
), pp. 737
–743
.38.
Jones
, V.
, and Launder
, B.
, 1972
, “Some Properties of Sink-Flow Turbulent Boundary Layers
,” J. Fluid Mech.
, 56
(2
), pp. 337
–351
.39.
Wu
, X.
, Jacobs
, R.
, Hunt
, J.
, and Durbin
, P.
, 1999
, “Simulation of Boundary Layer Transition Induced by Periodically Passing Wakes
,” J. Fluid Mech.
, 398
, pp. 109
–153
.40.
Zhong
, S.
, Kittichaikan
, C.
, Hodson
, H.
, and Ireland
, P.
, 1998
, “Visualisation of Turbulent Spots Under the Influence of Adverse Pressure Gradients
,” Exp. Fluids
, 28
(5
), pp. 385
–393
.41.
Fric
, T.
, and Roshko
, A.
, 1994
, “Vortical Structure in the Wake of a Transverse Jet
,” J. Fluid Mech.
, 279
, pp. 1
–47
.42.
Jacobs
, R.
, and Durbin
, P.
, 2001
, “Simulations of Bypass Transition
,” J. Fluid Mech.
, 428
, pp. 185
–212
.43.
Brinkerhoff
, J.
, and Yaras
, M.
, 2015
, “Numerical Investigation of Transition in a Boundary Layer Subjected to Favourable and Adverse Streamwise Pressure Gradients and Elevated Free Stream Turbulence
,” J. Fluid Mech.
, 781
, pp. 52
–86
.44.
Elofsson
, A.
, Kawakami
, M.
, and Alfredsson
, P.
, 1999
, “Experiments on the Stability of Streamwise Streaks in Plane Poiseuille Flow
,” Phys. Fluids
, 11
(4
), pp. 915
–930
.45.
Brandt
, L.
, and Henningson
, D.
, 2002
, “Transition of Streamwise Streaks in Zero-Pressure-Gradient Boundary Layers
,” J. Fluid Mech.
, 472
, pp. 229
–261
.46.
Katz
, Y.
, Seifert
, A.
, and Wygnanski
, I.
, 1990
, “On the Evolution of the Turbulent Spot in a Laminar Boundary Layer With a Favourable Pressure Gradient
,” J. Fluid Mech.
, 221
, pp. 1
–22
.47.
Brinkerhoff
, J.
, and Yaras
, M.
, 2012
, “Direct Numerical Simulation of a Square Jet Ejected Transversely Into an Accelerating, Laminar Main Flow
,” Flow, Turbul. Combust.
, 89
(4
), pp. 519
–546
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