Relaminarization of turbulent channel flow using traveling wave-like wall deformation

Rio Nakanishi, Koji Fukagata, Hiroya Mamori

研究成果: Paper査読

抄録

Effect of traveling wave-like wall deformation (i.e. peristalsis) in a fully developed turbulent channel flow is investigated by means of direct numerical simulation. We not only demonstrate that the friction drag is reduced by wavelike wall deformation traveling toward the downstream direction, but also show that the turbulence is completely killed (viz. the flow is re-laminarized) under some sets of parameters. It is also found that at higher amplitude of actuation the re-laminarized flow is unstable and exhibits a periodic cycle between high and low drag.

本文言語English
出版ステータスPublished - 2011 1 1
イベント7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada
継続期間: 2011 7 282011 7 31

Other

Other7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
CountryCanada
CityOttawa
Period11/7/2811/7/31

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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