*2.5. Boundary Conditions*

The boundary conditions are represented in Figure 6. Walls were defined following the default criteria of the software. The inlet velocity varied from 1 to 20 m/s according to the practical values offered by Vergne (2003). The velocity at the pressure outlet was set uniform at 0 Pa, so data were in manometric pressure.

**Figure 6.** Boundary conditions of the simulations.

#### *2.6. Software Configuration*

In order to obtain reliable data, the following simulation parameters (Table 2) were selected.


**Table 2.** Simulation parameters.

To minimize the results, errors all residuals of the simulation were set at 10<sup>−</sup>5. This fact enables us to obtain more reliable data. Also, all simulations were initialized with 0 velocity in the three components, which is more important in the mixture model simulations.
