Abstract
Two different wdf (wall-distance-free) approaches are devised using local wall-distance and dissipation based representations to obtain consistency formulations for blending functions associated with the SST model. The strain-dependent coefficient C̄μ assists the SST model in constructing the functions such as to benefit complex flows with non-equilibrium turbulence, while retaining the predictive quality of unmodified SST closure. Naturally, the proposed methods allow the original SST model to be modified accurately and alleviate the free-stream dependency. Comparisons with the original SST k-ω model demonstrate that the newly developed alternatives to actual wall-distance usually improve the response of SST model to non-equilibrium effects.
Original language | English |
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Pages (from-to) | 71-82 |
Number of pages | 12 |
Journal | European Journal of Mechanics, B/Fluids |
Volume | 75 |
DOIs | |
Publication status | Published - 1 May 2019 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Blending functions
- Non-equilibrium flow
- SST turbulence model
- Wall-distance-free
- REYNOLDS-STRESS
- TURBULENCE MODELS
- ARTIFICIAL COMPRESSIBILITY METHOD
- NEAR-WALL