**2. The model description**

**Figure 1** shows the geometry under consideration in the present work. The height of the ICE3 high-speed train (*HTrain*) is 3.5 m. Two barriers are set on the right and left sides, respectively. The distance between the two barriers (*LBarrier Distance*) is 14 m. The spacing between the barrier and the boundary of the calculation domain is 10*HTrain*, which is the same as the height of the computational domain. The wind blows parallel to ground level from the right to the left, with a uniform velocity of 80 m/s. The height and width of the calculation domain are 10*HTrain* and 2*HTrain*, respectively. Besides, the forces and momentums concerning the coordinate system's directions (x, y, z) are specified by the European Standard EN14067-6 (**Figure 1**).

**Figure 1.** *The computational domain and the aerodynamic coefficients definitions.*

**Figure 2.** *The model of considered geometry.*


**Table 1.**

*The barrier types with different inclined angles.*

In the present work, the effects of barriers are focused on. The heights of the two barriers (*HBarrier*) are the same and *HBarrier* = 3.0 m. As shown in **Figure 2**, the effect of barrier inclined angle (*θ*) is investigated in the present work. According to the different barrier inclined angles, nine types of cases are simulated (**Table 1**).
