In industrial applications, rotating flows have been recognized to enhance mixing and transfer properties. Moreover, bubbly flows are also used to improve transfers. Therefore, it is interesting to study the effects of the dispersed phase on the structure of a Couette Taylor flow. Experiments are conducted for the quasi-periodic $(Ta=780)$ and the weakly turbulent $(Ta=1000)$ flow regimes. Bubbles (0.035 times as small as the gap) are generated by agitation of the upper free surface (ventilated flow). Larger bubbles (0.15 times as small as the gap) are generated by injection at the bottom of the apparatus and by applying a pressure drop (gaseous-cavitating flow). Void fraction, bubble size, and velocity, as well as axial and azimuthal velocity components of the liquid are investigated. The bubble location in the gap clearly depends on the bubble size. For $α>0.1%$, there is evidence of bubble-induced modifications of axial transfers and wall shear stress, the observed trends being different according to the bubble location in the gap.

1.
Shiomi
,
Y.
,
Kutsuna
,
H.
,
Akagawa
,
K.
, and
Ozawa
,
M.
, 1993, “
Two-Phase Flow in an Annulus With a Rotating Inner Cylinder: Flow Pattern in Bubbly Flow Region
,”
Nucl. Eng. Des.
0029-5493,
141
, pp.
27
34
.
2.
Atkhen
,
K.
,
Fontaine
,
J.
, and
Wesfreid
,
J. E.
, 2000, “
Highly Turbulent Couette-Taylor Bubbly Flow Patterns
,”
J. Fluid Mech.
0022-1120,
422
, pp.
55
68
.
3.
Djeridi
,
H.
,
Favé
,
J. F.
,
Billard
,
J. Y.
, and
Fruman
,
D. H.
, 1999, “
Bubble Capture and Migration in Couette-Taylor Flow
,”
Exp. Tech.
0732-8818,
26
, pp.
233
239
.
4.
Djeridi
,
H.
,
Gabillet
,
C.
, and
Billard
,
J. Y.
, 2004, “
Two-Phase Couette Taylor Flow: Arrangement of the Dispersed Phase and Effects on the Flow Structures
,”
Phys. Fluids
1070-6631,
16
(
1
), pp.
128
139
.
5.
Cartelier
,
A.
, 1990, “
Optical Probes for Local Void Fraction Measurements: Characterization of Performance
,”
Rev. Sci. Instrum.
0034-6748,
61
(
2
), pp.
874
886
.
6.
Gabillet
,
C.
,
Colin
,
C.
, and
Fabre
,
J.
, 2002, “
Experimental Study of Bubble Injection in a Turbulent Boundary Layer
,”
Int. J. Multiphase Flow
0301-9322,
28
, pp.
553
578
.
7.
Clark
,
N. N.
, and
Turton
,
R.
, 1988, “
Chord Length Distributions Related to Bubble Size Distributions in Multiphase Flows
,”
Int. J. Multiphase Flow
0301-9322,
14
(
4
), pp.
413
424
.
8.
Cognet
,
G.
, 1984, “
Les Étapes vers la Turbulence dans l’Écoulement de Taylor Couette Entre Cylindres Coaxiaux
,”
J. Mec. Theor. Appl.
, Special issue, pp.
7
44
.
9.
Lance
,
M.
, and
Bataille
,
J.
, 1991, “
Turbulence in the Liquid Phase of a Uniform Bubbly Air-Water Flow
,”
J. Fluid Mech.
0022-1120,
222
, pp.
95
118
.
10.
Tam
,
W. Y.
, and
Swinney
,
H. L.
, 1987, “
Mass Transport in Turbulent Couette-Taylor Flow
,”
Phys. Rev. A
1050-2947,
36
, pp.
1374
1381
.
11.
Gopalan
,
S.
, and
Katz
,
J.
, 1999, “
Effect of Entrained Bubbles on the Structure of Vortex Rings
,”
J. Fluid Mech.
0022-1120,
397
, pp.
171
202
.
12.
Wereley
,
S. T.
, and
Lueptow
,
R. M.
, 1994, “
Azimuthal Velocity in Supercritical Circular Couette Flow
,”
Exp. Fluids
0723-4864,
18
, pp.
1
9
.