Control of the viscous sublayer for drag reduction

Changhoon Lee, John Kim

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We investigate the possibility of manipulating turbulence structures in the viscous sublayer for the purpose of drag reduction using a direct numerical simulation of a turbulent channel flow. Recognizing that a great portion of production of vorticity occurs in the viscous sublayer, a body force is used to suppress spanwise velocity in the sublayer, and a significant amount of drag reduction is obtained. A more realistic body force or wall movement in the spanwise direction using instantaneous wall-shear stress in a closed-loop control is shown to reduce drag as much as 35%. Implementation of such a body force using an electromagnetic force is also discussed.

Original languageEnglish
Pages (from-to)2523-2529
Number of pages7
JournalPhysics of Fluids
Volume14
Issue number7
DOIs
Publication statusPublished - 2002 Jul

Fingerprint

drag reduction
channel flow
direct numerical simulation
vorticity
shear stress
drag
turbulence
electromagnetism

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Lee, Changhoon ; Kim, John. / Control of the viscous sublayer for drag reduction. In: Physics of Fluids. 2002 ; Vol. 14, No. 7. pp. 2523-2529.
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Control of the viscous sublayer for drag reduction. / Lee, Changhoon; Kim, John.

In: Physics of Fluids, Vol. 14, No. 7, 07.2002, p. 2523-2529.

Research output: Contribution to journalArticle

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