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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Applications of Lattice Boltzmann Method to Turbulent Flow Around Two-Dimensional Airfoil
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Applications of Lattice Boltzmann Method to Turbulent Flow Around Two-Dimensional Airfoil

机译：格子玻尔兹曼方法在二维翼型绕流中的应用

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AbstractLattice Boltmzann method (LBM) has been developed as an important technique of computational fluid mechanics. Two-dimensional turbulent flow around NACA0012 airfoil, with Re=105 and AOA=4° (angle of attack), is simulated with “multiple-relaxation time” lattice Boltzmann method incorporated with Spalart-Allmaras (SA) turbulence model. From the viewpoint of industrial applications, the related computational aspects are discussed, such as treatments of wall boundary, far field boundary conditions, and the position of the airfoil in the domain. Meanwhile, to balance the computational loads and accuracy of the simulations, grid refinement is applied. According to the results, LBM gives pretty good predictions, and quite flexible domain size can be accepted if the far field boundary condition is well posed. Compared to 3D LES-LBM simulations, two-dimensional LBM with SA turbulent model is of lower computational load, but with good accuracy.
机译：摘要格子Boltmzann方法（LBM）已发展为一种计算流体力学的重要技术。使用结合了Spalart-Allmaras（SA）湍流模型的“多重弛豫时间”点阵玻尔兹曼方法，模拟了NACA0012机翼周围的二维湍流，Re = 105，AOA = 4°（迎角）。从工业应用的角度，讨论了相关的计算方面，例如壁边界的处理，远场边界条件以及机翼在域中的位置。同时，为了平衡计算量和仿真的准确性，应用了网格细化。根据结果​​，LBM给出了很好的预测，如果远场边界条件得当，则可以接受相当灵活的域大小。与3D LES-LBM仿真相比，带有SA湍流模型的二维LBM具有较低的计算负荷，但具有良好的准确性。

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