Dye Regions
Used for fluid motion tracking.
In a simulation, dye regions can be defined with the same or different colors. As a
fluid particle (without respect to its phase definition/density) passes through a
dye region it is assigned that regions defined color (integer, scalar property which
is then output in the particle data). The use of dye regions eliminates the need of
using multiple FLUID phase definitions to track the fluid flow from
a specific location.
Note:
- Dye regions can only be spherical in shape.
- If a particle passes through multiple dye regions, it will adopt the color of the last dye region through which it passed.
Commands
dyeRegions
{
dyeRegion
{
dyeregion_clr 1
dyeregion_cntr "0.0 0.1 0.2"
dyeregion_rad 0.1
dyeregion_radodx 2.5
dyeregion_tstart 0.0
dyeregion_tend 1.0
}
}Definitions
| Command | Contents | SI Unit Example |
|---|---|---|
| dyeregion_clr | Color assigned to the dye region | |
| dyeregion_cntr | Center coordinates of the dye region sphere | [m] |
| dyeregion_rad | Radius of the dye region sphere | [m] |
| dyeregion_radodx | Radius of the dye region sphere as a function of
Tip: For example, when
specified 3.0, this implies
. Note: If both
dyeregion_rad and
dyeregion_radodx are present, the latter
takes precedence. |
|
| dyeregion_tstart | Start time of dye injection | [s] |
| dyeregion_tend | End time of dye injection | [s] |