Assessment of turbulence models for the simulation of turbulent flows past bluff bodies
The accuracy of a recently developed one-equation turbulence model in predicting complex flows with massive separation is assessed against the well-known Spalart Allmaras (SA) and the k-ω-SST-Scale Adaptive Simulation (SAS) models. The unsteady 3-D flow past a square cylinder at Re=2.2×104, as well...
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| التنسيق: | article |
| منشور في: |
2016
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/4895 http://dx.doi.org/10.1016/j.jweia.2016.03.011 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://www.sciencedirect.com/science/article/pii/S0167610515300945 |
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| الملخص: | The accuracy of a recently developed one-equation turbulence model in predicting complex flows with massive separation is assessed against the well-known Spalart Allmaras (SA) and the k-ω-SST-Scale Adaptive Simulation (SAS) models. The unsteady 3-D flow past a square cylinder at Re=2.2×104, as well as a 3-D flow over a wall-mounted cube at Re=4.0×104 are computed and compared to available experimental data. The recently developed model is capable of resolving turbulent flow structures, thereby predicting all major unsteady phenomena with a marked improvement over other Reynolds average Navier–Stokes (RANS) models. The computational time required by the model in comparison to that required by Large Eddy Simulation (LES) renders it a suitable candidate for simulating 3D unsteady complex engineering flows such as building aerodynamics with reasonable accuracy. |
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