Define Far Field Conditions

Use the Far Field tool to define surfaces far away from the source of disturbance.

The flows at these boundaries are typically uniform. Far field is generally used for external flows, in which variables for free-stream conditions at far upstream are none.

Select the surfaces on which to apply the boundary condition in the following ways:
- While in the Flow ribbon, select surfaces, then right-click and select Assign Far Field from the context menu.
- From the Flow ribbon, Boundaries tools, click the Far Field tool.
  
  Figure 1.
  
  Select surfaces.
In the dialog, input values for each tab.
- Momentum
- Turbulence
- Temperature
  Note: This tab only becomes available if the Heat Transfer option is turned on in the Flow ribbon Physics tool.
- Setting
From the guide bar, execute the command in the following ways:
- Click to confirm your selection and remain in the tool.
  This allows you to continue creating instances and helps you visualize and edit instances with the legend.
- Click to confirm your selection and exit the tool.