Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet fully understood. To obtain some information related to this phenomenon, single-phase (pure water) flow and two-phase (water and microbubbles) channel flow measurements are taken. The void fraction conditions were varied while maintaining a Reynolds number of 5128 based on the half channel height. The study indicates that the presence of microbubbles within the boundary layer modifies the turbulence structure such that variations in time and space turbulent scales are observed, as well as ejection and sweep phenomena.
Issue Section:
Multiphase Flows
1.
McCormick
, M. E.
, and Bhattacharyya
, R.
, 1973, “Drag Reduction of a Submersible Hull by Electrolysis
,” Nav. Eng. J.
0028-1425, 85
(2
), pp. 11
–16
.2.
Madavan
, N. K.
, Merkle
, C. L.
, and Deutsch
, S.
, 1985, “Numerical Investigations Into the Mechanisms of Microbubble Drag Reduction
,” ASME J. Fluids Eng.
0098-2202, 107
(3
), pp. 370
–377
.3.
Merkle
, C. L.
, and Deutsch
, S.
, 1989, “Microbubble Drag Reduction
,” Frontiers in Experimental Fluid Mechanics
(Lecture Notes in Engineering
), Springer-Verlag
, Berlin
, Vol. 46
, pp. 291
–335
.4.
Kodama
, Y.
, 1999, “Turbulence Control by Functionalization Fluids
,” Proceedings of Symposium on Smart Control of Turbulence
, Tokyo, Japan, Dec. 2–3.5.
Kanai
, A.
, and Miyata
, H.
, 2001, “Direct Numerical Simulation of Wall Turbulent Flows With Microbubbles
,” Int. J. Numer. Methods Fluids
0271-2091, 35
(5
), pp. 593
–615
.6.
Xu
, L.
, Maxey
, M. R.
, and Karniadakis
, G. E.
, 2002,“Numerical Simulation of Turbulent Drag Reduction Using Microbubbles
,” J. Fluid Mech.
0022-1120, 468
, pp. 271
–281
.7.
Lu
, J.
, Fernandez
, A.
, and Tryggvason
, G.
, 2005, “The Effects of Bubbles in the Wall Drag in a Turbulent Channel Flow
,” Phys. Fluids
1070-6631, 17
(9
), 095102
.8.
Shen
, X.
, Ceccio
, S. L.
, and Perlin
, M.
, 2006, “Influence of Bubble Size on Micro-Bubble Drag Reduction
,” Exp. Fluids
0723-4864, 41
(3
), pp. 415
–424
.9.
Kawashima
, H.
, Kodama
, Y.
, Hinatso
, M.
, Hori
, T.
, Makino
, M.
, Ohnawa
, M.
, Jakeshi
, H.
, Sakoda
, M.
, and Matsuno
, F.
, 2007, “A Research Project on Application of Air Bubble Injection to a Full Scale Ship for Drag Reduction
,” Proceedings of FEDSM 2007
, San Diego, CA, July 30–Aug. 2, ASME, San Diego, CA, FEDSM 2007-37079.10.
Hassan
, Y. A.
, and Gutierrez-Torres
, C. C.
, 2006, “Investigation of the Drag Reduction Mechanism by Microbubble Injection Within a Channel Boundary Layer Using PIV
,” Nuc. Eng. Technol., J. Korean Nucl. Soc.
, 38
, pp. 763
–778
.11.
Warholic
, M. D.
, 1997, “Modification of Turbulent Channel Flow by Passive and Additive Devices
,” Ph.D. thesis, University of Illinois, Urbana, IL.12.
Ferrante
, A.
, and Elghobashi
, S.
, 2004, “On the Physical Mechanisms of Drag Reduction in a Spatially Developing Turbulent Boundary Layer Laden With Microbubbles
,” J. Fluid Mech.
0022-1120, 503
, pp. 345
–355
.13.
Lu
, S. S.
, and Willmarth
, W. W.
, 1973, “Measurements of the Structure of the Reynolds Stress in a Turbulent Boundary Layer
,” J. Fluid Mech.
0022-1120, 60
, pp. 481
–512
.14.
Wallace
, J. M.
, Eckelmann
, H.
, and Brodkey
, R. S.
, 1972, “The Wall Region in Turbulent Shear Flow
,” J. Fluid Mech.
0022-1120, 54
, pp. 39
–48
.15.
Robinson
, S. K.
, 1991, “Coherent Motion in the Turbulent Boundary Layer
,” Annu. Rev. Fluid Mech.
0066-4189, 23
, pp. 601
–639
.16.
Kawahara
, G.
, Ayukawa
, K.
, Ochi
, J.
, and Ono
, F.
, 1998, “Bursting Phenomena in a Turbulent Square-Duct Flow
,” JSME Int. J., Ser. B
1340-8054, 41
, pp. 245
–253
.17.
Chong
, M. S.
, Perry
, A. E.
, and Cantwell
, B. J.
, 1990, “A General Classification of Three-Dimensional Flow Fields
,” Phys. Fluids A
0899-8213, 2
, pp. 765
–777
.18.
Adrian
, R. J.
, Christensen
, K. T.
, and Liu
, Z. C.
, 2000, “Analysis and Interpretation of Instantaneous Turbulent Velocity Fields
,” Exp. Fluids
0723-4864, 29
, pp. 275
–290
.19.
Jeong
, J.
, and Hussain
, F.
, 1995, “On the Indentification of a Vortex
,” J. Fluid Mech.
0022-1120, 285
, pp. 69
–94
.20.
Jimenez
, J.
, and Pinelli
, A.
, 1999, “The Autonomous Cycle of Near-Wall Turbulence
,” J. Fluid Mech.
0022-1120, 389
, pp. 335
–359
.Copyright © 2008
by American Society of Mechanical Engineers
You do not currently have access to this content.
