Abstract
Considering the demanding of grid requirements for high-Reynolds-number wall-bounded flow, the wall-modeled large-eddy simulation (WMLES) is an attractive method to deal with near wall turbulence. However, the effect of subgrid-scale (SGS) models for wall-bounded turbulent flow in combination with wall stress models is still unclear. In this paper, turbulent channel flow at Reτ =1 000 are numerically simulated by WMLES in conjunction with four different SGS models, i.e., the wall-adapting local eddy-viscosity model, the dynamic Smagorinsky model, the dynamic SGS kinetic energy model and the dynamic Lagrangian model. The mean velocity profiles are compared with the law of the wall, and the velocity fluctuations are compared with direct numerical simulation data. The energy spectrum of velocity and wall pressure fluctuations are presented and the role of SGS models on predicting turbulent channel flow with WMLES is discussed.
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Conflict of interest: The authors declare that they have no conflict of interest. Wei-wen Zhao, De-cheng Wan are editorial board members for the Journal of Hydrodynamics and was not involved in the editorial review, or the decision to publish this article. All authors declare that there are no other competing interests.
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Project supported by the National Natural Science Foundation of China (Grant No. 52131102), the National Key Research and Development Program of China (Grant No. 2022YFC2806705).
Biography: Wei-wen Zhao (1990-), Male, Ph. D., Assistant Professor
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Zhao, Ww., Zhou, Fc., Fan, Gq. et al. Assessment of subgrid-scale models in wall-modeled large-eddy simulations of turbulent channel flows. J Hydrodyn 35, 407–416 (2023). https://doi.org/10.1007/s42241-023-0039-6
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DOI: https://doi.org/10.1007/s42241-023-0039-6