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Turbulence control in the Taylor-Couette flow system

DOI: 10.1615/ICHMT.2015.THMT-15.1590
pages 715-718

Hamid Oualli
Ecole Militaire Polytechnique, Fluid Mechanics Laboratory, BP 17, 16046 Bordj El Bahri, Algiers, Algeria

Mahmoud Mekadem
Ecole Militaire Polytechnique, Fluid Mechanics Laboratory, BP 17, 16046 Bordj El Bahri, Algiers, Algeria

Ahcene Bouabdallah
USTHB / Faculty of Physique, LTSE Laboratory, BP 32, Bab Ezzouar, 16111, Algiers, Algeria

Mohamed Gad-el-Hak
Virginia Commonwealth University, Mechanical Engineering Richmond, VA 23284-3015, USA

Résumé

The hydrodynamic stability of a viscous fluid flow in an annular space between a rotating inner cylinder and an outer fixed one is considered. The basic flow is axis-symmetric with two counter-rotating vortices each wavelength. Experiments are carried out together with numerical computations implemented using a finite-volume CFD code to simulate the flow under cross-sectional pulsatile solicitations. The controlling strategy consists in superimposing a radial pulsatile motion to the inner cylinder cross-section. It is aimed to tackle the transition process and to assess qualitative and quantitative effects of such a managing technique. As a result, transition to turbulence is substantially delayed with modulation of the inner cylinder cross-section. Turbulence state of the flow is thus postponed to largely higher values of the critical Taylor number.

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