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

All Science Journal Classification (ASJC) codes

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

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