格子玻尔兹曼方法耦合混合湍流模型算法

doi:10.12066/j.issn.1007-2861.2502

Abstract

Abstract: A hybrid turbulence simulation method combining Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES) was proposed based on the lattice Boltzmann method (LBM). RANS/LES-LBM method used a mixed-length RANS turbulence model to solve the problem of large errors in the conventional Smagorinsky model near the wall. Based on the method, a set of LBM parallel programs was independently developed for the hybrid turbulence model. Cylindrical, NACA0012 airfoil flow, and 30P30N three-segment airfoil flow problems were numerically calculated. Calculation results showed that RANS/LES-LBM method improved the error near the wall, had higher calculation accuracy, and exhibited good stability for complex high-Reynolds number flows. LBM paralled program used the OpenMP programming mode for parallel computing and showed good speed-up ratio, scalability, and other parallel performances. LBM multilayer meshes were also studied, which laid the foundation for the numerical simulation of complex geometric flow problems in the future.

Key words: lattice Boltzmann method (LBM), hybrid turbulence model, high Reynolds number, parallel computing

CLC Number:

O35
O246

HE Zejiang, ZHANG Wu, ZHU Wenhao, WANG Liangjun. Lattice Boltzmann method coupled hybrid turbulence model algorithm[J]. Journal of Shanghai University（Natural Science Edition）, 2026, 32(4): 714-727.

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URL: https://www.journal.shu.edu.cn/EN/10.12066/j.issn.1007-2861.2502

https://www.journal.shu.edu.cn/EN/Y2026/V32/I4/714

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Lattice Boltzmann method coupled hybrid turbulence model algorithm

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