LES of the adverse-pressure gradient turbulent boundary layer

M. Inoue, D. I. Pullin, Zambri Harun, I. Marusic

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We describe large-eddy simulations (LES) of the flat-plate turbulent boundary layer in the presence of an adverse pressure gradient. The stretched-vortex subgrid-scale model is used in the domain of the flow coupled to a wall model that explicitly accounts for the presence of a finite pressure gradient. The LES are designed to match recent experiments conducted at the University of Melbourne wind tunnel where a plate section with zero pressure gradient is followed by section with constant adverse pressure gradient. First, LES are described at Reynolds numbers based on the local free-stream velocity and the local momentum thickness in the range 6560-13,900 chosen to match the experimental conditions. This is followed by a discussion of further LES at Reynolds numbers at approximately 10 times and 100 times these values, which are well out of range of present day direct numerical simulation and wall-resolved LES. For the lower Reynolds number runs, mean velocity profiles, one-point turbulent statistics of the velocity fluctuations, skin friction and the Clauser and acceleration parameters along the streamwise, adverse pressure-gradient domain are compared to the experimental measurements. For the full range of LES, the relationship of the skin-friction coefficient, in the form of the ratio of the local free-stream velocity to the local friction velocity, to both Reynolds number and the Clauser parameter is explored. At large Reynolds numbers, a region of collapse is found that is well described by a simple log-like empirical relationship over two orders of magnitude. This is expected to be useful for constant adverse-pressure gradient flows. It is concluded that the present adverse pressure gradient boundary layers are far from an equilibrium state.

Original languageEnglish
Pages (from-to)293-300
Number of pages8
JournalInternational Journal of Heat and Fluid Flow
Volume44
DOIs
Publication statusPublished - Dec 2013
Externally publishedYes

Fingerprint

turbulent boundary layer
Large eddy simulation
large eddy simulation
Pressure gradient
pressure gradients
Boundary layers
Reynolds number
skin friction
Skin friction
free flow
Direct numerical simulation
low Reynolds number
scale models
wind tunnels
flat plates
direct numerical simulation
coefficient of friction
Wind tunnels
boundary layers
Momentum

Keywords

  • Adverse pressure gradient
  • Turbulent boundary layer
  • Wall-model LES

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

LES of the adverse-pressure gradient turbulent boundary layer. / Inoue, M.; Pullin, D. I.; Harun, Zambri; Marusic, I.

In: International Journal of Heat and Fluid Flow, Vol. 44, 12.2013, p. 293-300.

Research output: Contribution to journalArticle

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