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.
Restrictions:
Can only be used with atom_style granular.
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
Default: none