Wall-distance-free formulation for SST k-ω model

Research output: Contribution to journalArticle


Research units

  • Hangzhou Dianzi University
  • University College Dublin


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 languageEnglish
Pages (from-to)71-82
Number of pages12
JournalEuropean Journal of Mechanics, B/Fluids
Publication statusPublished - 1 May 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Blending functions, Non-equilibrium flow, SST turbulence model, Wall-distance-free, REYNOLDS-STRESS, TURBULENCE MODELS, ARTIFICIAL COMPRESSIBILITY METHOD, NEAR-WALL

ID: 31344486