For particles that meet the following criteria, the Custom Residence Time property
associated with these three plug-ins adds the value of the current Time Step (in seconds) to
the property.
The particle is of a type (e.g. ‘New Particle 1’) listed in the Particles
section of the model’s dialog box.
The particle is within the bounds of the geometry described by the appropriate
parameters for the given Geometry (center, radius, rotation, and so on.)
Particles that do not meet both these criteria will not have any value added to the
Custom Residence Time property. For example, if two particle types are defined in a
simulation and only the particles of type New Particle 1 spent in a specific region
are to be measured, you can define the parameters as follows:
In this example, you are defining a sphere to track the Custom Residence Time.
Although the simulation includes an additional particle type (New Particle 2),
because it is not displayed in the Particles list in the dialog box, particles of
this type will not have a value added to their Custom Residence Time attribute,
unlike the particles of type New Particle 1.
In this example, the particle of type New Particle 1 inside the described sphere is
the only particle to meet both criteria. As a result, it is the only particle whose
Custom Residence Time value will be increased.
