In recent years, Lattice Boltzmann method (LBM), has been applied in built wind simulation. In this study, LBM assembled with large-eddy simulation (LBM-LES) were employed, as well as the finite volume method (FVM-LES), to simulate an indoor isothermal forced convection case, aiming to verify the prediction accuracy of LBM-LES method, and to compare their results accuracy and computational speeds. The result shows that LBM-LES method can acquire FVM-LES’ precision in predicting indoor turbulent flow, however it required finer meshes. In the aspect of computational speed, LBM-LES expressed better parallel computational efficiency, especially when using more computational cores, the computational speed of LBM-LES became larger than that of FVM-LES in the case of the same results accuracy.
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