Applications of Lattice Boltzmann Method to Turbulent Flow Around Two-Dimensional Airfoil
Applications of Lattice Boltzmann Method to Turbulent Flow Around Two-Dimensional Airfoil
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DOI：
10.1080/19942060.2012.11015443
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发表时间：
2012-01
影响因子：
6.1
通讯作者：
Xiaopeng Chen
中科院分区：
文献类型：
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作者：
Xiaopeng Chen
摘要格子Boltmzann方法（LBM）是近年来发展起来的计算流体力学的一种重要方法。采用Spalart-Allmaras（SA）湍流模型和“多重弛豫时间”格子Boltzmann方法，对雷诺数Re=105、攻角AOA=4°的NACA 0012翼型二维湍流流动进行了数值模拟。从工业应用的角度出发，讨论了计算中的有关问题，如壁面边界处理、远场边界条件、翼型在区域中的位置等。同时，为了平衡计算负荷和模拟的准确性，网格细化。根据计算结果，LBM给出了很好的预测，如果远场边界条件是适定的，则可以接受相当灵活的区域尺寸。与三维LES-LBM模拟相比，采用SA湍流模型的二维LBM计算量小，但精度高。
Abstract Lattice 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.