Detached-eddy simulation based on unstructured and hybrid grid

被引：0

作者：

Zhang, Yang ^{[1
,3
]}

Zhang, Laiping ^{[1
,2
]}

He, Xin ^{[1
,2
]}

Deng, Xiaogang ^{[1
,4
]}

机构：

[1] State Key Laboratory of Aerodynamics of China Aerodynamics Research and Development Center, Mianyang

[2] Computational Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang

[3] Low Speed Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang

[4] National University of Defense Technology, Changsha

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2015年 / 36卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Detached-eddy simulation; Finite-volume method; Hybrid grid; Second order scheme; Self-adaptive dissipation; Unstructured grid;

D O I：

10.7527/S1000-6893.2014.0342

中图分类号：

学科分类号：

摘要：

To improve the turbulence simulation ability of the second order finite-volume algorithm based on unstructured and hybrid grid, a hybrid second order scheme is established by modifying the dissipation term of the standard Roe flux-difference splitting scheme and the numerical dissipation of the scheme can be self-adapted according to the detached-eddy simulation (DES) flow field information. The credibility of the approach is supported by two typical numerical examples of its application: Re=3900 circular cylinder and NACA 0021 airfoil at high angle of attack (60°), and the DES predictions are compared with experimental data and with other numerical solutions. The DES methods based on both the one equation Spalart-Allmaras turbulence model and the two equation k-ω shear stress transport (SST) model are used in the computation. The effects of numerical schemes and turbulence models are also discussed in the study, which shows that the scale of turbulence structure resolved by the hybrid scheme is smaller than that resolved by the standard Roe scheme and the corresponding flow field is better; meanwhile the DES methods used in this paper are little affected by their RANS-based models. ©, 2015, AAAS Press of Chinese Society of Aeronautics and Astronautics. All right reserved.

引用

页码：2900 / 2910

页数：10

共 31 条

[1]

Jiang Z., Xiao Z.L., Shi Y.P., Et al., Constrained large-eddy simulation of wall-bounded compressible turbulent flows, Physics of Fluids, 25, 10, (2013)

[2]

Spalart P.R., Jou W.H., Strelets M., Et al., Comments on the feasibility of LES for wings and on a hybrid RANS/LES approach, Proceedings of 1st AFOSR International Conference On DNS/LES, pp. 137-147, (1997)

[3]

Travin A., Shur M., Strelets M., Et al., Physical and numerical upgrades in the detached-eddy simulation of complex turbulent flows, Advances in LES of Complex Flows, pp. 239-254, (2004)

[4]

Haase W., Braza M., Revell A., DESider-A European Effort on hybrid RANS-LES Modeling, pp. 19-139, (2009)

[5]

Menter F., Kuntz M., Adaption of eddy-viscosity turbulence models to unsteady separated flow behind vehicles., The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, (2004)

[6]

Spalart P.R., Deck S., Shur M.L., Et al., A new version of detached-eddy simulation, resistant to ambiguous grid densities, Theory Computation Fluid Dynamics, 20, 3, pp. 181-195, (2006)

[7]

Nikitin N., Nicoud F., Wasistho B., Et al., An approach to wall modeling in large-eddy simulations, Physics of Fluids, 12, 7, pp. 1629-1632, (2000)

[8]

Shur M.L., Spalart P.R., Strelets M.K., Et al., A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities, International Journal of Heat and Fluid Flow, 29, 6, pp. 1638-1649, (2008)

[9]

Bui T.T., A parallel, finite-volume algorithm for large-eddy simulation of turbulent flow, Computers & Fluids, 29, 8, pp. 877-915, (2000)

[10]

Deng X.B., Zhao X.H., Yang W., Et al., Dynamic adaptive upwind method and it's applications in RANS/LES hybrid simulations, The Eighth International Conference on Computational Fluid Dynamics, pp. 807-814, (2014)

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