You will enter the following information for a pressure far-field boundary:
All values are entered in the Pressure Far-Field panel (Figure 7.9.1), which is opened from the Boundary Conditions panel (as described in Section 7.1.4).
Defining Static Pressure, Mach Number, and Static Temperature
To set the static pressure and temperature at the far-field boundary, enter the appropriate values for Gauge Pressure and Temperature in the Pressure Far-Field panel. You will also set the Mach Number there. The Mach number can be subsonic, sonic, or supersonic.
Defining the Flow Direction
You can define the flow direction at a pressure far-field boundary by setting the components of the direction vector. If your geometry is 2D non-axisymmetric or 3D, enter the appropriate values for X, Y, and (in 3D) Z-Component of Flow Direction in the Pressure Far-Field panel. If your geometry is 2D axisymmetric, enter the appropriate values for Axial, Radial, and (if you are modeling axisymmetric swirl) Tangential-Component of Flow Direction.
Defining Turbulence Parameters
For turbulent calculations, there are several ways in which you can define the turbulence parameters. Instructions for deciding which method to use and determining appropriate values for these inputs are provided in Section 7.2.2. Turbulence modeling is described in Chapter 12.
Defining Radiation Parameters
If you are using the P-1 radiation model, the DTRM, the DO model, or the surface-to-surface model, you will set the Internal Emissivity and (optionally) Black Body Temperature. See Section 13.3.15 for details.
Defining Species Transport Parameters
If you are modeling species transport, you will set the species mass fractions under Species Mass Fractions. See Section 14.1.5 for details.
Defining Discrete Phase Boundary Conditions
If you are modeling a discrete phase of particles, you can set the fate of particle trajectories at the pressure far-field boundary. See Section 22.13 for details.