Use a Particle () dataset, selected from the More Datasets submenu, to visualize particle traces computed by a Particle Tracing Module interface. The Particle dataset is automatically created when solving a model containing one of the Particle Tracing Module interfaces if the Generate default plots option is selected in the Study. Selections can be added to the particle dataset, which makes it possible to compute, for example, the number or fraction of particles in a given domain or on a given boundary during results processing. You can visualize the particles using a plot of the particle trajectories in the original dimension, as a Poincaré map, or as a 2D phase portrait.

Select a Solution from the list of solution data. Select a Particle geometry specification: Manual (the default) or From physics interface. If any particle trajectories have been solved for, then instead From physics interface is the default and an applicable particle tracing physics interface is selected from the Physics interface list (see below).

If Manual is selected, the Particle geometry and Position-dependent variables text fields become available. In the Particle geometry field, enter the name of the variable for the particle geometry. This corresponds to the hidden geometry on which the particle degrees of freedom are computed. When the Particle dataset is generated from the default plots, the correct name for the particle geometry is filled in automatically. The particle geometry takes the name pgeom_<id>, where <id> is the Name for the specific Particle Tracing interface node.

In the Position-dependent variables field, enter the names of the dependent variables for the particles’ position using commas to separate the variables. Like the particle geometry, the names of the particle degrees of freedom are filled in automatically when the particle dataset is generated from the default plots. The names correspond to the particle position degrees of freedom with the component name prepended. For example, for a 3D component, with name comp1 and dependent variables qx, qy, and qz for the physics interface, the correct expression to enter is comp1.qx, comp1.qy, and comp1.qz.

If From physics interface is selected, select the Physics interface from which the particle geometry and the names of the particle position degrees of freedom are defined. Only physics interfaces that can create a valid particle geometry are shown.