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Modelling turbulent skin-friction control using linearized Navier–Stokes equations
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Duque-Daza, Carlos A., Baig, M. F., Lockerby, Duncan A., Chernyshenko, S. I. and Davies, C. (2012) Modelling turbulent skin-friction control using linearized Navier–Stokes equations. Journal of Fluid Mechanics, Volume 702 . pp. 403-414. doi:10.1017/jfm.2012.189 ISSN 0022-1120.
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Official URL: http://dx.doi.org/10.1017/jfm.2012.189
Abstract
Linearized Navier–Stokes equations are solved to investigate the impact on the growth of near-wall turbulent streaks that arises from streamwise-travelling waves of spanwise wall velocity. The percentage change in streak amplification due to the travelling waves, over a range of wave parameters, is compared to published direct numerical simulation (DNS) predictions of turbulent skin-friction reduction; a clear correlation between the two is observed. Linearized simulations at a much higher Reynolds number, more relevant to aerospace applications, produce results that show no marked differences to those obtained at low Reynolds number. It is also observed that there is a close correlation between DNS data of drag reduction and a very simple characteristic of the ‘generalized’ Stokes layer generated by the streamwise-travelling waves.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | Journal of Fluid Mechanics | ||||
Publisher: | Cambridge University Press | ||||
ISSN: | 0022-1120 | ||||
Official Date: | July 2012 | ||||
Dates: |
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Volume: | Volume 702 | ||||
Page Range: | pp. 403-414 | ||||
DOI: | 10.1017/jfm.2012.189 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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