*2.3. Boundary and Initial Conditions*

The following boundary conditions were imposed on the boundary surfaces shown in Figure 6:


In order to facilitate the vortex shedding formation and, consequently, speed up the transient state, the following initial conditions given by simple arbitrary functions with respect to the domain coordinates were imposed:

$$u = 1.0 - \frac{0.1 \ (\text{x} - 1.0)}{(\text{x} - 1.0)^2 + y^2 + 0.1}; v = \frac{0.1 \ y}{(\text{x} - 1.0)^2 + y^2 + 0.1}; w = 0; \, p = 0 \,\text{.}\tag{11}$$

**Figure 6.** Computational domain (representative, not to scale) showing the surfaces on which boundary conditions are applied.
