IMECH-IR  > 非线性力学国家重点实验室
Towards Large-eddy Simulation of Turbulent Flows with Complex Geometric Boundaries Using Immersed Boundary Method
Yang XL(杨晓雷); He GW(何国威); Zhang X(张星)
Source PublicationAIAA-2010-708
2010
Conference Name48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Conference Date2010-1-4~2010-1-7
Conference PlaceOrlando, Florida
AbstractApproximate immersed boundary conditions for large-eddy simulation (LES) of turbulent flows in combination with immersed boundary method are proposed. The approximate immersed boundary conditions are based on the fluxes and the shear stresses in order to ensure the momentum conservation: the velocity boundary conditions are imposed to the convection terms and the shear stress boundary conditions imposed to the diffusion terms. On a body-fitted grid, they are exactly the same as the non-penetration and wall stress boundary conditions, for the immersed boundary method they are now the generalized off-wall boundary conditions. This strategy is tested in turbulent channel flows with the wall not being aligned with Cartesian grids. The results obtained show the promising of this strategy in simulations of high Reynolds number turbulent flows. The effects of different eddy-viscosity models used in conjunction with approximate immersed boundary conditions need to be further investigated.
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44608
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Yang XL,He GW,Zhang X. Towards Large-eddy Simulation of Turbulent Flows with Complex Geometric Boundaries Using Immersed Boundary Method[C],2010.
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