On Large-Scale Friction Control in Turbulent Wall Flow in Low Reynolds Number Channels
作者: Jacopo CantonRamis ÖrlüCheng ChinNicholas HutchinsJason MontyPhilipp Schlatter
作者单位: 1KTH Mechanics
2University of Melbourne
刊名: Flow, Turbulence and Combustion, 2016, Vol.97 (3), pp.811-827
来源数据库: Springer Journal
DOI: 10.1007/s10494-016-9723-8
关键词: Flow controlSkin-friction reductionTurbulent channel flowDirect numerical simulation
英文摘要: Abstract(#br)The present study reconsiders the control scheme proposed by Schoppa & Hussain (Phys. Fluids 10 , 1049–1051 1998 ), using a new set of numerical simulations. The computations are performed in a turbulent channel at friction Reynolds numbers of 104 (the value employed in the original study) and 180. In particular, the aim is to better characterise the physics of the control as well as to investigate the optimal parameters. The former purpose lead to a re-design of the control strategy: moving from a numerical imposition of the mean flow to the application of a volume force. A comparison between the two is presented. Results show that the original method only gave rise to transient drag reduction. The forcing method, on the other hand, leads to sustained drag reduction, and...
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影响因子:1.274 (2012)

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关键词翻译
关键词翻译
  • Reynolds 雷诺
  • Control 控制