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fix freeze command

Syntax:

fix ID group-ID freeze 

Examples:

fix 2 bottom freeze 

Description:

Zero out the force and torque on a granular particle. This is useful for preventing certain particles from moving in a simulation.

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

No information about this fix is written to binary restart files. None of the fix_modify options are relevant to this fix. No quantities calculated by this fix can be output by the thermo_style custom command. 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:

This fix is part of the "granular" package. It is only enabled if LAMMPS was built with that package. See the Making LAMMPS section for more info.

There can only be a single freeze fix defined. This is because other parts of the code (pair potentials, thermodynamics, etc) treat frozen particles differently and need to be able to reference a single group to which this fix is applied.

Related commands: none

atom_style granular

Default: none