Journal of Applied Electrochemistry, Vol.37, No.1, 57-62, 2007
Electrochemical analysis of Taylor vortices
Steady Taylor vortices in the annular gap between coaxial cylinders were studied using the electrodiffusion method. The cylinders had an aspect ratio of 17.7 and a radius ratio of 0.5. The inner cylinder was driven with a stepping motor. The Reynolds number was in the range (113, 880). Two three-segment circular probes were imbedded with a horizontal shift of 5 mm in the wall of the outer fixed cylinder. The vortexes were swept along the probes by a slow upwards axial motion of the electrolyte solution. The axial distribution of the axial and azimuthal components of the wall shear rate was obtained and fitted by sixth-order Fourier series. The torque was calculated from the azimuthal component. The vortex ascending velocity and vortex height were evaluated from the correlation and autocorrelation functions of the measured current.