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- W4206707680 abstract "Hybrid RANS-LES simulations with transition modeling are performed on the OA209 airfoil test case at two poststall angles of attack with a mesh of $1.17cdot 10^8$ cells. The model couples the equations of ZDES mode 2 (2020) with the Langtry-Menter correlation-based transition model. An enhancement of the shielding function is proposed and validated for the laminar and transitional region, even in the presence of a laminar separation bubble. The model is therefore able to treat these regions in a RANS manner, and the laminar-turbulent transition is adequately described by the $gamma-Re_{theta,mathrm{t}}$ equations. However, the transition shielding function is not sensitive to turbulent separation, and a zonal treatment allows a recovery of the ZDES mode 2 (2020) shielding in the fully turbulent region of the suction side. This method allows the model to switch to LES when the turbulent flow separates. The model's behavior is validated regarding the inner working of the transition model, its activation in the near-wall leading edge region, and the switch to LES when the turbulent flow separates on the suction side and at the trailing edge pressure side." @default.
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- W4206707680 date "2022-01-03" @default.
- W4206707680 modified "2023-09-25" @default.
- W4206707680 title "ZDES accounting for transition of the OA209 airfoil in poststall conditions" @default.
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- W4206707680 doi "https://doi.org/10.2514/6.2022-1544" @default.
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