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

Rio Nakanishi, Hiroya Mamori, Koji Fukagata

研究成果: Article査読

51 被引用数 (Scopus)

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 wave-like wall deformation traveling toward the downstream direction, but also show that the turbulence is completely suppressed (viz. the flow is relaminarized) under some sets of parameters. It is also found that at higher amplitude of actuation the relaminarized flow is unstable and exhibits a periodic cycle between high and low drag. The drag reduction is caused by suppression of random Reynolds shear stress component due to stabilization. The quadrant analysis reveals that traveling wave-like wall deformation makes strongly negative random Reynolds shear stress in the converging region.

本文言語English
ページ(範囲)152-159
ページ数8
ジャーナルInternational Journal of Heat and Fluid Flow
35
DOI
出版ステータスPublished - 2012 6 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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