On Near-Wall Dynamic Coupling of LES With RANS Turbulence Models
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In this paper, the RANS/LES coupling formulation proposed in [1–3] is adapted for various RANS turbulence models. In that formulation, the LES subgrid-scale eddy-viscosity is replaced in the near-wall region with a RANS eddy-viscosity dynamically corrected with the resolved turbulent stress. The RANS eddy-viscosity is first obtained from precomputed tables. To further generalize the approach, RANS turbulence model equations (for Spalart-Allmaras and k-ω) are then solved simultaneously with the LES. Detailed results are presented for channel flow at Reτ = 395 and compared to traditional LES. The method is then applied to a serpentine passage and compared with DNS computations [4] at Reτ = 180.
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2002 ◽
Vol 40
(10)
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pp. 1275-1302
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2018 ◽
Vol 15
(2)
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pp. 75-89
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1991 ◽
Vol 34
(7)
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pp. 1905-1908
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1989 ◽
Vol 33
◽
pp. 541-546