Transpired turbulent boundary layers: a general strategy for RANS turbulence models
| Autor: | François Chedevergne, Yann Marchenay |
|---|---|
| Přispěvatelé: | ONERA / DMPE, Université de Toulouse [Toulouse], ONERA-PRES Université de Toulouse |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS]Physics [physics]
Suction Turbulence Computational Mechanics General Physics and Astronomy Boundary (topology) Mechanics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics [SPI]Engineering Sciences [physics] Mechanics of Materials SUCTION 0103 physical sciences BLOWING TURBULENCE MODEL 010306 general physics Reynolds-averaged Navier–Stokes equations Geology TRANSPIRED BOUNDARY LAYERS |
| Zdroj: | Journal of Turbulence Journal of Turbulence, Taylor & Francis, 2019, 20 (11-12), pp.681-696. ⟨10.1080/14685248.2019.1702198⟩ |
| ISSN: | 1468-5248 |
| DOI: | 10.1080/14685248.2019.1702198 |
| Popis: | International audience; Transpired boundary layers are of major interest for many industrial applications. Although well described, there is no turbulence model specifically dedicated to the prediction of boundary layers for both blowing and suction configurations. Revisiting closure relations of turbulence models, a general strategy was established to recover Stevenson's law of the wall that described the behavior of transpired boundary layers in the wall region. The methodology is applied to the k − ω SST turbulence model and compared to Wilcox's correction, only applicable to blowing cases. A version of the proposed correction, more suited to RANS solvers, was also derived. Several experimental boundary layer configurations with blowing or suction were computed using both versions of the correction. The good agreements observed on all cases prove the relevance and the efficiency of the present strategy. Abbreviations: l mixing length u longitudinal velocity component v wall-normal velocity component u longitudinal velocity fluctuation v wall-normal velocity fluctuation x longitudinal direction y wall-normal direction k turbulent kinetic energy ω specific dissipation δ1 displacement thickness τ shear stress ρ density ν kinematic viscosity νt eddy viscosity µ dynamic viscosity κ Kàrmàn constant + superscript for dimensionless wall quantities w subscript for quantities at the wall Reynolds average |
| Databáze: | OpenAIRE |
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