Study of Taylor-Couette flow using a three-segment electrodiffusion probe

Autor: B. Benabes, V. Sobolik, G. Cognet
Rok vydání: 1995
Předmět:
Zdroj: Journal of Applied Electrochemistry. 25
ISSN: 1572-8838
0021-891X
DOI: 10.1007/bf00260686
Popis: The axial and azimuthal components of the shear rate on the wall of the outer fixed cylinder of a pair of concentric cylinders with the inner cylinder rotating was measured using a three-segment electrodiffusion probe. The axial distribution of the components was found by sweeping vortices past the probe by means of a small axial flow. A nonzero axial shear rate component indicated the onset of Taylor vortices. Azimuthal waves on the vortices caused fluctuations of both components. The instabilities were measured in two geometries characterized by R 1/R 2 = 0.84 and 0.7. The probe was calibrated in the same apparatus with R 1/R 2 = 0.94. The Stuart theory for the growth of vortex velocity with angular velocity agrees well with the amplitude of the fundamental mode measured with R 1/R 2 = 0.84. Qualitative agreement was found with the numerical results of Fasel and Booz, especially between the axial shear rate component measured with R 1/R 2 = 0.7 and the vorticity calculated for R 1/R 2 = 0.5.
Databáze: OpenAIRE
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