https://doi.org/10.1140/epjp/i2019-12764-1
Regular Article
Experimental investigation of the spherical Couette flow using electrodiffusion technique
1
Department of Physics, Superior School of Applied Sciences of Algiers, Place des Martyrs, B.P 474, Algiers, Algeria
2
Department of Energetics and fluid mechanics, Faculty of Physics, University of Sciences and Technology Houari Boumediene, El Alia 16111, BP No. 32, Algiers, Algeria
3
INRA, UR 1268 Biopolymers Interactions and Assemblies, 44316, Nantes, France
* e-mail: mmahloul@yahoo.fr
Received:
2
February
2019
Accepted:
16
May
2019
Published online:
14
August
2019
In this paper, we present an experimental study of the occurrence of different flow modes between two coaxial rotating spheres. The electrodiffusion (ED) method and the visualization technique were used to determine the various flow regimes for an aspect ratio 
ranging from 18 to 21, and for different values of the Taylor number Ta . The dimensionless gap has width 
. The inner sphere rotates while the outer one is at rest. The visualization allowed to identify several bifurcation paths during the laminar-turbulent transition. Furthermore, the ED method permitted the measurement of the coefficient of friction in the inner wall of the outer sphere. The flow is analyzed by varying the iso-correlation and the phase space obtained by the ED method.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
