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

Rio Nakanishi, Koji Fukagata, Hiroya Mamori

Research output: Contribution to conferencePaper

Abstract

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.

Original languageEnglish
Publication statusPublished - 2011 Jan 1
Event7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada
Duration: 2011 Jul 282011 Jul 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

Fingerprint Dive into the research topics of 'Relaminarization of turbulent channel flow using traveling wave-like wall deformation'. Together they form a unique fingerprint.

  • Cite this

    Nakanishi, R., Fukagata, K., & Mamori, H. (2011). Relaminarization of turbulent channel flow using traveling wave-like wall deformation. Paper presented at 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011, Ottawa, Canada.