Modelling turbulent skin-friction control using linearized Navier-Stokes equations

Duque-Daza, C., Baig, M. F., Lockerby, D., Chernyshenko, S. and Davies, Christopher ORCID: https://orcid.org/0000-0002-5592-9541 2012. Modelling turbulent skin-friction control using linearized Navier-Stokes equations. Journal of Fluid Mechanics 702 , pp. 403-414. 10.1017/jfm.2012.189

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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:	Article
Date Type:	Publication
Status:	Published
Schools:	Mathematics
Subjects:	Q Science > QA Mathematics T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	drag reduction; turbulence control
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0022-1120/ (accessed 21/02/2014).
Publisher:	Cambridge University Press
ISSN:	0022-1120
Date of First Compliant Deposit:	30 March 2016
Last Modified:	06 Jan 2024 04:52
URI:	https://orca.cardiff.ac.uk/id/eprint/25034

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