Attention: This command is in the beta stage and the format may change over time.
"Optional title"
sid, $t_{clean}$, gid, repeat
Parameter definition
sid Subdomain ID
$t_{clean}$ Clean-up time
gid Geometry ID
repeat Flag to repeat clean-up at time interval $t_{clean}$
0 $\rightarrow$ clean up once
1 $\rightarrow$ repeat

This command is used to de-activate particles inside a geometry at time $t_{clean}$.

For SPH particles the geometry ID can be omitted. If omitted then all SPH fragments except the largest piece will be deleted. This option is typically used to remove small fragments when modelling the formation of a shaped charge jet.