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Embedded Large-Eddy Simulation Using the Partially Averaged Navier–Stokes Model

Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära) ; Shia-Hui Peng (Institutionen för tillämpad mekanik, Strömningslära)
AIAA Journal (0001-1452). Vol. 51 (2013), 5, p. 1066-1079.
[Artikel, refereegranskad vetenskaplig]

An embedded large-eddy-simulation modeling approach is explored and verified using the partially averaged Navier-Stokes model as a platform. With the same base model, the turbulence-resolving large-eddy simulation region is embedded by setting the partially averaged Navier-Stokes model coefficient to f(k) < 1 as distinguished from its neighboring Reynolds-averaged Navier-Stokes region, where f(k) = 1 is specified. The embedded large-eddy simulation approach is verified in computations of a turbulent channel flow and a turbulent flow over a hump. Emphasis is placed on the impact of turbulent conditions at the Reynolds-averaged Navier-Stokes/large-eddy simulation interface using anisotropic velocity fluctuations generated from synthetic turbulence. The effect of the spanwise size of the computational domain is investigated. It is shown that the embedded large-eddy-simulation method based on the partially averaged Navier-Stokes modeling approach is computationally feasible and able to provide reasonable turbulence-resolving predictions in the embedded large-eddy simulation region. The wall-adapting local eddy-viscosity model is also evaluated for the hump flow and it is found that its performance is worse than that of the the low-Reynolds-number partially averaged Navier-Stokes model when the results are compared with experiments.

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Denna post skapades 2013-03-19. Senast ändrad 2013-07-16.
CPL Pubid: 174847


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