Experimental Investigations of a Modified Taylor-Couette Flow

In this study the instability problem of a modified
Taylor-Couette flow between two vertical coaxial cylinders of radius
R1, R2 is considered. The modification is based on the wavy shape of
the inner cylinder surface, where inner cylinders with different
surface amplitude and wavelength are used. The study aims to
discover the effect of the inner surface geometry on the instability
phenomenon that undergoes Taylor-Couette flow. The study reveals
that the transition processes depends strongly on the amplitude and
wavelength of the inner cylinder surface and resulting in flow
instabilities that are strongly different from that encountered in the
case of the classical Taylor-Couette flow.





References:
[1] Dong S., “Direct Numerical Simulation of Turbulent Tyaylor-Couette
Flow”, J. Fluid Mech. (2007), vol. 587, pp. 373–393.
[2] Rafique M., “Etude de l’écoulement entre deux cylindres coaxiaux à
entrefer constant et à entrefer ondule par la surface du cylindre intérieur
tournant”, Doctorat de INPL, 1999.
[3] M. Rafique, S. Skali Lami. “A study of steady state flow in modified
Taylor-Couette system: Inner rotating wavy cylinder coaxial with a
smooth stationary outer cylinder”. 11th International Couette-Taylor
Workshop, Germany, 1999, 105-106.
[4] Drozdov S. M., Skali Lami S., Rafique M., “An asymmetrical periodic
vortical structures and appearance of the self-induced pressure gradient
in the modified Taylor Flow”, 13th Int. Taylor Couette Workshop, 2003.
[5] Esmael A., Elshrif A., “Experimental Investigations of Classical Taylor
Couette Flow”, Third Tunisian conference on mechanics, Sousse Mars
2014.