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Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force

Huang, LePing; Choi, Kwing-So; Fan, BaoChun; Chen, YaoHui

Authors

LePing Huang

KWING-SO CHOI kwing-so.choi@nottingham.ac.uk
Professor of Fluid Mechanics

BaoChun Fan

YaoHui Chen



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.

Journal Article Type Article
Publication Date Nov 30, 2014
Journal Science China Physics, Mechanics and Astronomy
Print ISSN 1674-7348
Electronic ISSN 1869-1927
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 57
Issue 11
APA6 Citation Huang, L., Choi, K., Fan, B., & Chen, Y. (2014). Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force. SCIENCE CHINA Physics, Mechanics and Astronomy, 57(11), https://doi.org/10.1007/s11433-014-5416-2
DOI https://doi.org/10.1007/s11433-014-5416-2
Keywords Turbulence control, Direct numerical simulation, Channel flow, Lorentz force, Drag reduction
Publisher URL https://link.springer.com/article/10.1007/s11433-014-5416-2
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information The final publication is available at Springer via http://dx.doi.org/10.1007/s11433-014-5416-2.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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