Laser-induced fluorescence (LIF) was applied for the flow visualization of the formation of a Taylor vortex, which occurred in the gap between two coaxial cylinders. The test fluids were tap water and glycerin 60 %wt solution as Newtonian fluids; polyacrilamide (SeparanAP-30) solutions in the concentration range of $10$ to $1000ppm$ and polyethylene-oxide (PEO15) solutions in the range of $20$ to $1000ppm$ were tested as non-Newtonian fluids. The Reynolds number range in the experiment was $80. The rotating inner cylinder was accelerated under the slow condition $(dRe*∕dt⩽1min−1)$ in order to obtain a Taylor vortex flow in stable primary mode. Flow visualization results showed that the Görtler vortices of half the number of the Taylor cells occurred in the gap when the Taylor vortex flow was formed in the primary mode. In addition, the critical Reynolds number of the polymer solutions increased, where Taylor vortices occur, because the generation of the Görtler vortices was retarded. In high concentration polymer solutions, this effect became remarkable. Measurements of steady-state Taylor cells showed that the upper and lower cells of polymer solutions became larger in wavelength than those of the Newtonian fluids. The Taylor vortex flow of non-Newtonian fluids was analyzed and the result obtained using the Giesekus model agreed with the experimental result.

1.
Taylor
,
G. I.
, 1923, “
Stability of a Viscous Liquid Contained Between Two Rotating Cylinders
,”
Philos. Trans. R. Soc. London, Ser. A
0962-8428,
223
, pp.
289
343
.
2.
Toms
,
B. A.
, 1948, “
Some Observations on the Flow of Linear Polymer Solutions Thorough Straight Tubes at Large Reynolds Number
,”
Proc. of Int. Conger. on Rheology
,
II
, pp.
135
138
.
3.
Larson
,
R. G.
,
Shaqfeh
,
E. S. G.
, and
Muller
,
S. J.
, 1990, “
A Purely Elastic Instability in Taylor-Couette Flow
,”
J. Fluid Mech.
0022-1120,
218
, pp.
573
600
.
4.
,
B.
, and
Sureshkumar
, 2002, “
Viscoelastic Effects on the Stability of Wall-Bounded Shear Flows
,”
Phys. Fluids
1070-6631,
14
(
1
), pp.
41
48
.
5.
Sureshkumar
,
R.
,
Beris
,
A. N.
, and
Avgousti
,
M.
, 1994, “
Non-Axisymmetric Subcritical Bifurcations in Viscoelastic Taylor-Couette Flow
,”
Proc. R. Soc. London, Ser. A
1364-5021,
447
, pp.
135
153
.
6.
Groisman
,
A.
, and
Steinberg
,
V.
, 1996, “
Couette-Taylor Flow in a Dilute Polymer Solution
,”
Phys. Rev. Lett.
0031-9007,
77
(
8
), pp.
1480
1483
.
7.
Lee
,
S. H. -K
,
Sengupta
,
S.
, and
Wei
,
T.
, 1995, “
Effect of Polymer Additives on Görtler Vortices in Taylor-Couette Flow
,”
J. Fluid Mech.
0022-1120,
282
, pp.
115
129
.
8.
Gorman
,
M.
, and
Swinney
,
H. L.
, 1982, “
Spatial and Temporal Characteristics of Modulated Waves in the Circular Couette System
,”
J. Fluid Mech.
0022-1120,
117
, pp.
123
142
.
9.
Zakin
,
J. L.
, and
Chang
,
J. L.
, 1974, “
Polyoxyethylene Alcohol Non-Ionic Surfactants as Drag Reducing Additives
,”
Proc. of Inter. Conf. on Drag Reduction
, BHRA, pp.
D1
-1–D1-
14
.
10.
Imai
,
S.
, and
Shikata
,
T.
, 2001, “
Viscoelastic Behavior of Surfactant Threadlike Micellar Solutions; Effect of Additives
,”
J. Colloid Interface Sci.
0021-9797,
244
, pp.
399
404
.
11.
Watanabe
,
K.
,
Takayama
,
T.
, and
Ogata
,
S.
, 2002, “
Formation Process of Taylor Cells of a Surfactant Solution Proc. of Rheology and Fluid Mechanics of Nonlinear Materials
,” ASME IMECE FED-259, pp.
1
6
.
12.
Snyder
,
H. A.
, 1969, “
Wave-Number Selection at Finite Amplitude in Rotating Couette Flow
,”
J. Fluid Mech.
0022-1120,
35
(
2
), pp.
273
298
.
13.
Wei
,
T.
,
Kline
,
E. M.
,
Lee
,
S. H. -K.
, and
Woodruff
,
S.
, 1992, “
Görtler Vortex Formation at the Inner Cylinder in Taylor-Couette Flow
,”
J. Fluid Mech.
0022-1120,
245
, pp.
47
68
.
14.
Barcilon
,
A.
,
Brindley
,
L.
,
Lessen
,
M.
, and
Mobbs
,
F. R.
, 1979, “
Marginal Instability in Taylor-Couette Flows at a Very High Taylor Number
,”
J. Fluid Mech.
0022-1120,
94
(
3
), pp.
453
463
.
15.
Giesekus
,
H.
, 1982, “
A Simple Constitutive Equation for Polymer Fluids Based on the Concept of Deformation Dependent Tensorial Mobility
,”
J. Non-Newtonian Fluid Mech.
0377-0257,
11
, pp.
69
109
.
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