Boundary Sampling Model Reference
The Boundary Sampling model records parcel states when they impact particular boundaries.
Every time a parcel impacts one of the designated boundaries, the values of all the user-selected variables are stored, together with the following:
- Parcel Centroid, the instantaneous parcel centroid.
- Parcel Index.
- Time (unsteady) or Particle Residence Time (steady).
- Particle Count (unsteady) or Particle Flow Rate (steady).
The Boundary Sampling model differs from the Track File model in that it does not have a file that is associated with it. Sampled quantities are stored in memory, and are accessed through particle track parts that are added to the Particle Tracks folder when boundaries are added to the Boundaries property of the model node. One particle track part is added for each boundary that is selected to participate in sampling.
| Provided By | |||
| Example Node Path | |||
| Requires | Optional Models: Lagrangian Multiphase | ||
| Properties | Key properties are: Scalars, Vectors, Boundaries. See Boundary Sampling Model Properties. | ||
| Activates | Physics Models | See Selecting the DEM Boundary Sampling Model. | |
| Field Functions | Track: Parcel Index, Track: Position, Track: Time. See Boundary Sampling Field Functions. | ||
Boundary Sampling Model Properties
- Boundaries
- The set of boundaries for which particle sampling is active.
- Scalars
- Selects a set of scalar field functions, with a Select Objects dialog, for
recording on the boundary.
Three scalars that are automatically selected, Parcel Index, Time (or Particle Residence Time in steady simulations), and Particle Count (or Particle Flow Rate in steady simulations) appear in the Selected list. They are in grayed-out text, since they cannot be removed from the selector.
- Vectors
- Selects a set of vector field functions, with a Select Objects dialog, for
recording on the boundary.
One vector that is automatically selected, Parcel Centroid appears in the Selected list in grayed-out text, since it cannot be removed from the selector.
Selecting the DEM Boundary Sampling Model
If you are using the Discrete Element Method (DEM) and the Boundary Sampling Model, the DEM Boundary Sampling Model becomes available. This model makes the Impact Velocity field function available and tracks particle velocity at the initial impact point for the selected surfaces.
Select the Boundary Sampling option from the Track Sampling group in the Phase Model Selection dialog.
Boundary Sampling Field Functions
- Track: Parcel Index
- The identifying parcel index, stored on the boundary crossed by the parcel.
- Track: Position
- The parcel position, stored on the boundary crossed by the parcel.
- Track: Time
- The time at which a parcel crosses a boundary, stored on the boundary.