Wall-modeled large-eddy simulation of high Reynolds number flow around an airfoil near stall condition

Soshi Kawai, Kengo Asada

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

This paper investigates the capability of large-eddy simulation (LES) with wall-modeling in predicting transitional and separated flow over an airfoil near stall condition at high Reynolds number (chord based Rec=2.1×106). By incorporating the non-equilibrium effects and transition treatment in the wall model, the wall-modeled LES well predicts the mean and turbulence statistics in the region of laminar separation, turbulent transition, turbulent reattachment, and initial-mid developments of attached turbulent boundary layer. The present LES with non-equilibrium wall-model reproduces the dynamics of two-dimensional intermittent laminar separation vortices, hairpin-like vortices, and breakdown of the laminar separation vortices to three-dimensional turbulent structures that allow the boundary layer to reattach. Comparisons between the non-equilibrium and equilibrium wall-models highlight the importance of including the non-equilibrium effects in the model.

Original languageEnglish
Pages (from-to)105-113
Number of pages9
JournalComputers and Fluids
Volume85
DOIs
Publication statusPublished - 2013 Oct 1
Externally publishedYes

Keywords

  • High Reynolds number flow
  • Large-eddy simulation
  • Separated flow
  • Wall modeling

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

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