Application of a near-wall turbulence model to the flows over a step with inclined wall
โ Scribed by Jong Woo Ahn; Tae Seon Park; Hyung Jin Sung
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 746 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0142-727X
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โฆ Synopsis
A nonlinear low-Reynolds-number k-e model of was extended to predict the flows over a step with inclined wall, where a boundary-layer flow without separation and a separated and reattaching flow coexist. For a better prediction of the flows, a slight modification was made on the function of wall damping f~ and the model constant C~1 in the s-equation. The model performance was validated by comparing the model predictions with the experiment. It was shown that the flows over a step with inclined wall are simulated successfully with the present model.
๐ SIMILAR VOLUMES
The present work performs a detailed comparison between numerical computations for the flow over a two-dimensional steep hill and some newly obtained laboratory data. Six turbulence models were tested: four eddy-viscosity models (k-, RNG-, k-o, SST) and two second-moment models (SSG-RSM-, BSL-RSM-o)
Generalized wall functions in application to high-Reynolds-number turbulence models are derived. The wall functions are based on transfer of a boundary condition from a wall to some intermediate boundary near the wall (usually the first nearest to the wall mesh point but that is not obligatory). The
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