Suboptimal control of turbulent channel flow for drag reduction

Chang Hoon Lee, John Kim, Haecheon Choi

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

Two simple feedback control laws for drag reduction are derived by applying a suboptimal control theory to a turbulent channel flow. These new feedback control laws require pressure or shear-stress information only at the wall, and when applied to a turbulent channel flow at Reτ = 110, they result in 16-22% reduction in the skin-friction drag. More practical control laws requiring only the local distribution of the wall pressure or one component of the wall shear stress are also derived and are shown to work equally well.

Original languageEnglish
Pages (from-to)245-258
Number of pages14
JournalJournal of Fluid Mechanics
Volume358
DOIs
Publication statusPublished - 1998 Mar 10

Fingerprint

drag reduction
Drag reduction
channel flow
Channel flow
Feedback control
Shear stress
feedback control
shear stress
Skin friction
Control theory
friction drag
Drag
wall pressure
control theory
skin friction

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lee, Chang Hoon ; Kim, John ; Choi, Haecheon. / Suboptimal control of turbulent channel flow for drag reduction. In: Journal of Fluid Mechanics. 1998 ; Vol. 358. pp. 245-258.
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Suboptimal control of turbulent channel flow for drag reduction. / Lee, Chang Hoon; Kim, John; Choi, Haecheon.

In: Journal of Fluid Mechanics, Vol. 358, 10.03.1998, p. 245-258.

Research output: Contribution to journalArticle

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