**6. Conclusions**

In the present work, a 3D numerical model of a train-barrier-crosswind system is adopted to investigate the influence of two inclined barriers on the aerodynamic mechanism of a high-speed train by utilizing the Lattice Boltzmann Method. The influence of barrier inclination angle and direction on the velocity, pressure, turbulence intensity, streamlines, and aerodynamic coefficients are investigated. It has been discovered that utilizing barriers with a positive inclination angle cannot reduce the

drag coefficient. The drag coefficient can be reduced by using barriers with zero or negative angles. When all aerodynamic coefficients are taken into account, barriers with zero or negative inclination angles are the best choice for reduction of its. The value of the rolling moment coefficient reaches a minimum when the inclined angle of the barrier becomes = +5.0°.
