Domain and Geometry

The model domain is the area where simulation takes place. It is defined in the Environment section of the Creator tree and indicated by the red box in the Viewer:

 

 

Particles that move out of the domain during the course of the simulation are permanently removed from the simulation (unless a periodic boundary condition has been selected). Geometry can move in and out of the domain during a simulation.

Defining the Model Domain

Domain size has an effect on simulation time - the larger the domain, the longer the simulation will take to run. Use the auto-update option to automatically fit the domain around any sections of geometry defined, thus creating the smallest domain possible.

 

Note: Geometries should not be placed totally coincident with the edge of the domain. Particles are removed as soon as they reach the domain edge, so cannot interact with any geometry placed there. However, if you are using Linear Periodic Boundaries you should update these to be coincidental to the geometry to avoid particles leaving the simulation due to the gap between the geometry and the domain.