*3.1. Domain Dimensions*

The numerical domain included the wind tunnel space and the IceWind turbine, as shown in Figure 7, to simulate the flow around the turbine. The upstream, downstream, width, and height dimensions were 500, 500, 300, and 300 mm, respectively, as shown in Figure 7. The domain's overall dimensions were 300 × 300 × 1000 mm. These dimensions are the wind tunnel and turbine dimensions given in [3].

A position angle θ was defined as the angle where the blade tips were inclined to the direction of the wind tunnel's air flow, as shown in Figure 8.

**Figure 7.** Wind tunnel space with the IceWind turbine and domain dimensions (mm).

**Figure 8.** A position angle θ of the turbine's two blades.

#### *3.2. Boundary Conditions*

The boundary conditions are shown in Figure 9 and Table 1. They are exactly as used in [3]. The left boundary was defined as an inlet. The air flow was a wind velocity of 15.8 m/s. A pressure outlet boundary condition was assumed at the right boundary. Other boundaries and the turbine were considered to be walls.

**Figure 9.** Boundary conditions.


**Table 1.** Boundary conditions.
