Dye Regions

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.
`dyeregion_rad`	Radius of the dye region sphere.	[m]
`dyeregion_radodx`	Radius of the dye region sphere as a function of dx, for example, when specified 3.0, implies 3.0*dx. Note: If both `dyeregion_rad` and `dyeregion_radodx` are present, the latter takes precedence.
`dyeregion_tstart`	Start time of dye injection.
`dyeregion_tend`	End time of dye injection.