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基于格子Boltzmann方程的大涡模拟对湍流时空关联性的研究

Keywords: 格子Boltzmann方法,均匀各向同性湍流,大涡模拟,亚格子模型

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Abstract:

将格子Boltzmann方程和大涡模拟(LBE-LES)相结合,提出适应于格子Boltzmann方法(LBM)的涡黏性亚格子尺度模型,开展均匀各向同性湍流时空关联性的研究.采用D3Q19格式计算湍流的三维能谱、湍动能耗散率和其它高阶统计量,与实验和直接数值模拟结果的比较表明,该模型比传统涡黏模型有明显改进.考察了不同亚格子模型预测湍流频率波数能量谱的能力,结果表明,尺度涡产生的横扫作用是造成小尺度涡时间去关联的主要因素,不同波数的频率能量谱之间有一定的相似性,横扫速度是描述湍流频率波数能量谱的特征量.

References

[1]  Dong Y H, Sagaut P, Marie S. Inertial consistent subgrid model for large-eddy simulation based on the lattice Boltzmann method[J]. Physics of Fluids, 2008,20,035104-1-11.
[2]  Qian Y, d\'Humieres D, Lallemand P. Lattice BGK models for Navier-Stokes equations[J]. Europhysics Letters, 1992,17:479-484.
[3]  Meyers J, Sagaut P. On the model coefficients for the standard and the variational multi-scale Smogorisky model[J]. Journal of Fluid Mechanics, 2006,569:287-319.
[4]  Pope S B. Turbulent flows[M]. Cambridge: Cambridge University Press, 2000.
[5]  Dong Y H, Sagaut P. A study of time correlations in lattice Boltzmann-based large-eddy simulation of isotropic turbulence[J]. Physics of Fluids, 2008,20:035105-1-12.
[6]  Kang H S, Chester S, Meneveau C. Decaying turbulence in an active-grid-generated flow and comparisons with large-eddy simulation[J]. Journal of Fluid Mechanics, 2003,480:129-160.
[7]  Wang M, Freund J B, Lele S K. Computational prediction of flow-generated sound[J]. Annual Review of Fluid Mechanics, 2006,38:483-512.
[8]  Lighthill M J. On sound generated aerodynamically, Part I: general theory //Proceedings of the Royal Society of London. London: , 1952, A 211:564-587.
[9]  Proudman I. The generation of sound by isotropic turbulence //Proceedings of the Royal Society of London. London: , 1952, A 214:119-152.
[10]  Smagorinsky J. General circulation experiments with the primitive equations[J]. Monthly Weather Review, 1963,91:99-165.
[11]  Chen H, Chen S, Matthaeus H W. Recovery of the Navier-Stokes equation using a lattice Boltzmann method[J]. Physical Review E, 1992, A 45:5339-5342.
[12]  Marié S, Ricot D, Sagaut P. Comparison between lattice Boltzmann method and Navier-Stokes high order schemes for computational aeroacoustics[J]. Journal of Computional Physics, 2009,228:1056-1067.
[13]  Lavoie P, Burattini P, Djenidi P, et al. Effect of initial conditions on decaying grid turbulence at low Reynolds number[J]. Experiments of Fluids, 2005,39:865-874.
[14]  Kraichnan R H. Kolmogorov\'s hypotheses and Eulerian turbulence theory[J]. Physics of Fluids, 1964,7:1723-1734.
[15]  He G W, Wang M, Lele S K. On the computation of space-time correlations by large-eddy simulation[J]. Physics of Fluids, 2004,16:3859-3867.

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