Suboptimal control of turbulent channel flow for drag reduction

Changhoon Lee, John Kim, Haecheon Choi

Research output: Contribution to journalArticle

140 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

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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