Discussion: “An Experimental Study of Taylor Vortices and Turbulence in Flow Between Eccentric Rotating Cylinders” (Vohr, J. H., 1968, ASME J. Lubr. Technol., 90, pp. 285–296)

1968 ◽  
Vol 90 (3) ◽  
pp. 644-644
Author(s):  
E. R. Krueger
Keyword(s):  
Experimental Study ◽  
Rotating Cylinders ◽  
Taylor Vortices

An Experimental Study of Taylor Vortices and Turbulence in Flow Between Eccentric Rotating Cylinders

1968 ◽  
Vol 90 (1) ◽  
pp. 285-296 ◽  
Author(s):  
J. H. Vohr
Keyword(s):  
Experimental Study ◽  
Turbulent Flow ◽  
Friction Factor ◽  
Experimental Work ◽  
Reynolds Numbers ◽  
Taylor Vortex ◽  
Rotating Cylinders ◽  
Taylor Vortices ◽  
Torque Measurements ◽  
Factor Data

The critical speeds for onset of Taylor vortices inflow between eccentric rotating cylinders are determined by means of torque measurements for various eccentricity ratios and clearance ratios of the cylinders. Results are compared with the theoretical and experimental work of other investigators. Visual studies are made of the flow in both the Taylor vortex and turbulent flow regimes. Friction factor data are obtained for Reynolds numbers up to 40,000.

Visual Observations and Torque Measurements in the Taylor Vortex Regime Between Eccentric Rotating Cylinders

1971 ◽  
Vol 93 (1) ◽  
pp. 121-129 ◽  
Author(s):  
P. Castle ◽  
F. R. Mobbs ◽  
P. H. Markho
Keyword(s):  
Outer Cylinder ◽  
Taylor Vortex ◽  
Rotating Cylinders ◽  
Taylor Vortices ◽  
Torque Measurements ◽  
Good Agreement ◽  
Visual Observations

The instability of Taylor vortices in the flow between a stationary outer cylinder and an eccentric rotating inner cylinder has been investigated by visual observations and by torque measurements. It is shown that both a “weak” and “strong” wavy mode of instability can be detected by torque measurements, giving critical Taylor numbers in good agreement with visual observations.

Highly turbulent Couette–Taylor bubbly flow patterns

2000 ◽  
Vol 422 ◽  
pp. 55-68 ◽  
Author(s):  
K. ATKHEN ◽  
J. FONTAINE ◽  
J. E. WESFREID
Keyword(s):  
Experimental Study ◽  
Free Surface ◽  
Turbulent Flows ◽  
Rotational Speed ◽  
Bubbly Flow ◽  
Axial Flow ◽  
Taylor Vortices ◽  
Phase Velocities ◽  
Temporal Properties ◽  
Visualization Techniques

We present the results of experimental study of a Couette–Taylor system with superimposed axial flow and an upper free surface, in the high Taylor number regime. At large Taylor numbers, when the rotational speed of the inner cylinder increases, bubbles created near the free surface are distributed throughout the test section and permit the study of the spatial and temporal properties of turbulent flows using visualization techniques. In addition to classic travelling Taylor vortices, intermittent pulses of vortices with higher phase velocities are also observed. These patterns are described in terms of the rotational speed and the intensity of the throughflow.

Taylor Vortices with Eccentric Rotating Cylinders

Nature ◽  
1967 ◽  
Vol 216 (5121) ◽  
pp. 1200-1202 ◽  
Author(s):  
J. A. COLE
Keyword(s):  
Rotating Cylinders ◽  
Taylor Vortices

An experimental study of Couette instability of stratified fluids

1974 ◽  
Vol 66 (4) ◽  
pp. 725-737 ◽  
Author(s):  
E. M. Withjack ◽  
C. F. Chen
Keyword(s):  
Experimental Study ◽  
Critical Speed ◽  
Outer Cylinder ◽  
Spiral Wave ◽  
Angular Speed ◽  
Wave Form ◽  
Salt Solutions ◽  
Taylor Vortices ◽  
Critical Wavelength ◽  
The Stability

The stability of Couette flow of stratified salt solutions is investigated in an apparatus with both the inner and outer cylinders rotating. The ratio of the radius of the inner cylinder to that of the outer cylinder is 0·2. The flow is visualized by means of shadowgraph and dye-trace methods. Compared with homogeneous fluids, the effect of the stabilizing density gradient is to increase the critical speed of the inner cylinder and to decrease the critical wavelength for a given angular speed of the outer cylinder. When the cylinders are rotating in the same direction, in the critical state, the instabilities appear along the inner cylinder in a spiral wave form which is itself not very stable. With counterrotating cylinders, the instabilities appear as regularly spaced vortices which, for the most part, are neither symmetric Taylor vortices nor simple spirals. In addition, these vortices rotate as a whole at a speed generally smaller than that of the inner cylinder. From shadowgraph observations, stability curves are constructed for three density gradients. The critical wavelength and the rotational periods of the vortices are also determined.

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