Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force

Huang, LePing and Choi, Kwing-So and Fan, BaoChun and Chen, YaoHui (2014) Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force. Science China Physics, Mechanics and Astronomy, 57 (11). pp. 2133-2140. ISSN 1869-1927

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Abstract

Turbulent control and drag reduction in a channel flow via a bidirectional traveling wave induced by spanwise oscillating Lorentz force have been investigated in the paper. The results based on the direct numerical simulation (DNS) indicate that the bidirectional wavy Lorentz force with appropriate control parameters can result in a regular decline of near-wall streaks and vortex structures with respect to the flow direction, leading to the effective suppression of turbulence generation and significant reduction in skin-friction drag. In addition, experiments are carried out in a water tunnel via electro-magnetic (EM) actuators designed to produce the bidirectional traveling wave excitation as described in calculations. As a result, the actual substantial drag reduction is realized successfully in these experiments.

Item Type: Article
Additional Information: The final publication is available at Springer via http://dx.doi.org/10.1007/s11433-014-5416-2.
Keywords: Turbulence control, Direct numerical simulation, Channel flow, Lorentz force, Drag reduction
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1007/s11433-014-5416-2
Depositing User: Choi, Professor Kwing-So
Date Deposited: 21 Sep 2017 07:51
Last Modified: 23 Oct 2017 16:53
URI: http://eprints.nottingham.ac.uk/id/eprint/46543

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