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

Koji Fukagata, Nobuhide Kasagi, Petros Koumoutsakos

Research output: Contribution to journalArticle

136 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

Fingerprint

friction drag
drag reduction
Drag reduction
turbulent flow
Turbulent flow
Friction
predictions
Direct numerical simulation
channel flow
Channel flow
direct numerical simulation
Reynolds number
slip

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics

Cite this

A theoretical prediction of friction drag reduction in turbulent flow by superhydrophobic surfaces. / Fukagata, Koji; Kasagi, Nobuhide; Koumoutsakos, Petros.

In: Physics of Fluids, Vol. 18, No. 5, 051703, 05.2006.

Research output: Contribution to journalArticle

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