The Simulation Mode/Duration panel allows the user to define settings that will affect the transient results.

The Time Simulation options control what calculations will be performed by xStream. There are two time simulation options:

• AFT Arrow Steady - This simulation mode runs the network solution methodology found in AFT Arrow to give steady-state results for the model.

• Transient - This simulation mode runs the MOC solution methodology for the transient simulation as defined by the user. This option is the default selection.

The Start Time and Stop Time refer to the beginning and end times for the simulation. The units can be specified using the drop-down box.