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Drag reduction in turbulent channel flow by spanwise oscillating Lorentz force

Mei Dong-Jie Fan Bao-Chun Huang Le-Ping Dong Gang

Drag reduction in turbulent channel flow by spanwise oscillating Lorentz force

Mei Dong-Jie, Fan Bao-Chun, Huang Le-Ping, Dong Gang
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  • Abstract views:  3566
  • PDF Downloads:  749
  • Cited By: 0
Publishing process
  • Received Date:  04 November 2009
  • Accepted Date:  24 December 2009
  • Published Online:  05 May 2010

Drag reduction in turbulent channel flow by spanwise oscillating Lorentz force

  • 1. Science and Technology on Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China

Abstract: Direct numerical simulation (DNS) of a turbulent channel flow is carried out to investigate the effect and mechanism of using spanwise oscillating Lorentz force to reduce boundary layer friction.We discussed the influence of Lorentz force intensity St and oscillating frequency T+ on the drag reduction effect and turbulent burst events. The results suggest the varying tendencies with St or T+ of the frequency of the turbulent bursts events are opposite to the intensity of the turbulent bursts events,and there exists an optimal parameter to achieve the largest amount of drag reduction.The composite effect of St and T+ can be well described by the equivalent spanwise wall velocity W+.

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