Parametric Moving Geometry¶

These are the parameters that define the child geometry. The categories, settings, and/or selections available within the property grid depend on the child geometry type, as listed in the catalogue.

Parametric moving geometry objects define motion expressions supported by particle, scalar field, and global variable parent objects. For particle and scalar field parents, these objects can define a moving addition or sink region. For global variables, these objects can model a moving analysis region. This functionality is illustrated in the examples below.

Examples¶

Example 1: Casting Particles¶

In this example, we model the hand casting of particles above the free surface of an agitated vessel. The position of the moving injection cuboid is described using a sinusoidal trajectory. This functionality can also be applied to bubbles (for modeling moving spargers) as well as DEM particles (for modeling moving particle sources).

Download Sample File: Casting Particles

Example 2: Photodegradation¶

In this next example involving scalar fields, we model photodegradation via a moving light source. Physically speaking a light beam is moving across a tank causing local species depletion.

Download Sample File: Degradation

Example 3: Moving Evaluation Region¶

For global variables, the moving geometry represents a moving evaluation region. The reductions can be applied to both moving child geometry and static child geometry. In the example below, we use a moving geometry that rotates with the impeller to sample the energy dissipation rate in the trailing vortex behind an impeller blade.

Download Sample File: Moving Evaluation Region

Property Grid¶

`General`¶

Location: This parameter defines the position of the geometry mount point within the domain. Editing this value adjusts the location of the geometry within the domain.

If an object is selected from the Parametric Primitives group, the following setting will launch.

Primitive Type

This parameter defines how the primative geometry is filled. Two options are available: shell and solid. These options inform the behavior of the Trim command.

Shell: This defines the primitive as a zero-thickness surface.
Solid: This defines the primitive as a filled solid object.

`Shape Parameters`¶

These are the parameters that define the child geometry. The exposed parameters will depend on the geometry type, as listed below.

Catalogue¶