Duque-Daza, C., Baig, M. F., Lockerby, D., Chernyshenko, S. and Davies, Christopher ![]() |
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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 |
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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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