Syntax:
temp_modify temp-ID keyword value ...
extra value = N
N = # of extra degrees of freedom to subtract
dynamic value = yes or no
yes/no = do or do not recompute the number of atoms contributing to the temperature
Examples:
temp_modify mine extra 0 temp_modify mine dynamic yes
Description:
Modify the parameters of a previously defined temperature method. This can either be the default temperature defined by LAMMPS (ID = default) or a user-defined temperature created by using the temperature command.
The extra keyword refers to how many degrees-of-freedom are subtracted (typically from 3N) as a normalizing factor in the temperature computation. The default is 3 which is a correction factor for an ensemble of velocities with zero total linear momentum.
The dynamic keyword determines whether the number of atoms N in the temperature group is re-computed each time the temperature is computed. By default, N is assumed to be constant. If you are adding atoms to the system (see the fix pour or fix deposit commands) or expect atoms to be lost (e.g. due to evaporation), then this option can be used to insure the temperature is correctly normalized.
Restrictions: none
Related commands:
Default:
The option defaults are extra = 3 and dynamic = no.