Command manual

Command list

PARTICLE_HE

Particle
Attention: This command is in the beta stage and the format may change over time.
*PARTICLE_HE
coid
type, gid, follow, ., ., ., ., $t_{end}$
$\rho_0$, $e_0$, $\gamma$, $v$, $D$

Parameter definition

VariableDescription
coid Sub-domain ID
type High explosive type
options:
TNT $\rightarrow$ TNT
C4 $\rightarrow$ Comp C-4
PETN $\rightarrow$ pentaerythritol tetranitrate
m46 $\rightarrow$ m46
HMX $\rightarrow$ HMX
CompA $\rightarrow$ Comp A-3
CompB $\rightarrow$ Comp B (grade A)
Octol $\rightarrow$ Octol 78/22
LX-10-1 $\rightarrow$ LX-10-1
PBXN-9010 $\rightarrow$ PBXN-9010
Tetryl $\rightarrow$ Tetryl
ANFO $\rightarrow$ Ammonium nitrate fuel oil
PBXN-110 $\rightarrow$ PBXN-110
MCX-6100 $\rightarrow$ MCX-6100
NSP-711 $\rightarrow$ NSP-711
USER $\rightarrow$ User defined
gid Geometry ID
follow Force particles to follow overlapping elements
options:
0 $\rightarrow$ no
1 $\rightarrow$ yes
$t_{end}$ Particle deactivation time
default: not used
$\rho_0$ Density (this line is only used if type=USER)
$e_0$ Energy per unit volume
$\gamma$ Fraction between C${}_\mathrm{p}$ and C${}_\mathrm{v}$
$v$ Co-volume at $\rho = \rho_0$
$D$ Detonation velocity

Description

Discrete particle high explosive domain definition.

The command id (coid) determines in which order particles are filled into the global domain. In case sub-domains are overlapping, the domain with the largest ID will overwrite (remove) particles belonging to domains with lower domain ID's.

The follow flag can be used when gid is a GEOMETRY_PART. Setting follow=1 forces the particles to follow the motion of the finite elements (where they are embedded). Note that the elements and the particles represent the same material. Elements are active prior to erosion and the particles are active after erosion. This feature is typically used to model undetonated explosive material with Finite Elements. At detonation the elements are eroded (e.g. ACTIVATE_ELEMENTS) and replaced by the particles.