TY - CONF
T1 - Relaminarization of turbulent channel flow using traveling wave-like wall deformation
AU - Nakanishi, Rio
AU - Fukagata, Koji
AU - Mamori, Hiroya
N1 - Funding Information:
The authors are grateful to Dr. Shinnosuke Obi (Keio University), Dr. Jerome Hœpffner (UPMC), Drs. Nobuhide Kasagi and Yosuke Hasegawa (The University of Tokyo), and Dr. Kaoru Iwamoto (Tokyo University of Agriculture and Technology) for fruitful discussions. This work was supported through Grant-in-Aid for Scientific Research (A) (No. 20246036) by Japan Society for the Promotion of Science (JSPS) and Keio University Global COE program of “Center for Education and Research of Symbiotic, Safe and Secure System Design.”
Publisher Copyright:
© 2011 International Symposium on Turbulence and Shear Flow Phenomena, TSFP07. All rights reserved.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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M3 - Paper
AN - SCOPUS:85048541097
T2 - 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
Y2 - 28 July 2011 through 31 July 2011
ER -