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fix particletemplate/sphere command

Syntax:

fix ID group-ID particletemplate/sphere seed keyword values ...  

Examples:

fix pts1 all particletemplate/sphere 1 atom_type 1 density constant 2500 radius constant 0.0015 

Description:

Define a particle that is used as input for a fix_particledistribution_discrete command. You can choose the atom type, density and radius of the particles. For density and radius, there is currently only a 'constant' style. Note that this is not a restriction since multiple commands of style particletemplate/sphere can be used in a fix_particledistribution_discrete command so any kind of distribution can be approximated to any arbitrary precision.

Keyword relative lets the user set a flag to let other commands know if the radii specified by this command are absolute (length units) or relative (in % of a reference radius). IMPORTANT NOTE: This setting should not be changed away from the default value (no) unless explicity required by another command!

LIGGGHTS(R)-PUBLIC will throw an error if the particle volume is too small compared to machine precision. If you are sure you know what you are doing you can override the default limit of 1e-12.

Restart, fix_modify, output, run start/stop, minimize info:

Information about the random state in this fix is written to binary restart files so you can restart a simulation with the same particles being chosen for insertion. None of the fix_modify options are relevant to this fix. No global scalar or vector or per-atom quantities are stored by this fix for access by various output commands. No parameter of this fix can be used with the start/stop keywords of the run command. This fix is not invoked during energy minimization.

Restrictions: none

Related commands:

fix_particletemplate_sphere

Default:

radius = 1.0, density = 1.0, atom_type = 1, volume_limit = 1e-12, relative = no