A theoretical prediction of friction drag reduction in turbulent flow by superhydrophobic surfaces

Koji Fukagata, Nobuhide Kasagi, Petros Koumoutsakos

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

We present a theoretical prediction for the drag reduction rate achieved by superhydrophobic surfaces in a turbulent channel flow. The predicted drag reduction rate is in good agreement with results obtained from direct numerical simulations at Reτ ≃ 180 and 400. The present theory suggests that large drag reduction is possible also at Reynolds numbers of practical interest (Reτ ∼105-106 by employing a hydrophobic surface, which induces a slip length on the order of ten wall units or more.

Original languageEnglish
Article number051703
JournalPhysics of Fluids
Volume18
Issue number5
DOIs
Publication statusPublished - 2006 May
Externally publishedYes

ASJC Scopus subject areas

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

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