In addition to the standard spatially averaged and spatially resolved output, Ansys Forte offers a variety of monitor probes designed for more customized flow solution inquiries. Certain monitor probes can be applied to several types of user-specified regions, and can monitor spatially averaged and instantaneous solution data within the regions. Other monitor probes can be applied in a spatially resolved manner and to specified locations, in order to calculate time-averaging and other useful statistical information from the local solution data.
This section reviews the options available for setting up the various
types of monitor probes. To create a probe, click the New Monitor Probe 
icon on this panel. A probe can be set up to monitor instantaneous,
spatially averaged data within specified regions. In this case, the probe can monitor:
a geometric region, whose shape can be spherical, annulus, or bounding box.
a boundary-condition-based region.
an initialization region.
an injection source.
an injection source intercepted by a plane.
a spray patternator.
a sub-volume.
a planar fluid interface intercepted by a control surface.
Alternatively, a probe can be set up as a point cloud to monitor time-averaged, spatially resolved data. In this case, the probe can be either:
Wall sampling, in which the point clouds are distributed on a wall boundary to monitor wall heat transfer, or
General data sampling, in which the point clouds are distributed in the fluid domain to monitor gas-phase solutions in general.
Monitored solutions are inquired at a fixed and user-specified frequency, based on either time or crank angle, or a set of user-specified discrete times or crank angles. The Inquiry Frequency need to be set on this panel (Monitor Probes Panel) and applied to all the probes. For probes for instantaneous and spatially averaged data, the inquiry frequency is also the data output frequency. For probes for time-averaged and spatially resolved data, the inquiry frequency is the frequency to inquire solutions and perform time-averaging numerically. In this case, more frequent inquires would make time-averaging more accurate.
To set a fixed, interval-based inquiry frequency, you may choose the Frequency Option as either Time or Crank Angle, and set the Output Every interval. Select User Defined Monitor Inquiry Points to set specific discrete crank angles (for engine simulations) or times by using a profile. If the user-defined frequency is based on crank angle, you may select the Repeat Profile Each Cycle option to convert the CA values to fit in the range of [0, 720) °CA (for 4-stroke engines) or [0, 360) °CA (for 2-stroke engines), and they will be treated as cyclic and repeated on a 720-degree schedule (4-stroke) or 360-degree schedule (2-stroke). You may choose to Use Global Crank Angle Limits to impose a global crank angle range for the cyclic repetition of these CA values. If the Repeat Profile Each Cycle option is not selected, then the CA values will not be converted to cyclic.
The Spray Patternator is a special type of monitor probe that is used to track how much liquid mass from certain nozzles has crossed a monitor plane and where the liquid crosses the monitor plane.
The following sections describe each type of monitor probe in more detail.