[lammps-users] Questions about new and old version

Dear all,

I have a question about new and old version software.

  1. Recently, I have found that the same input for relaxation of dislocation in new and old version LAMMPS, will obtain different relaxation results. In old version, the atoms are arranged well, while in new version atoms are in wrong sites but maintain right configuration, I am puzzled about these results.

The input file is the following:

units metal

dimension 3

boundary s s s

atom_style molecular

read_data data.type1

pair_style sw

pair_coeff * * GaN.sw Ga N

compute 2 all stress/atom

compute 3 all pe/atom

fix 2 all nve

run

thermo 100

minimize 1.0e-4 1.0e-6 100 1000

#timestep 0.001ps

dump 2 all xyz 100 dump.crystal

run 10000000

  1. If I only use nve command without langevin , How does the LAMMPS determine the temperature of the system?

Best wishes,

Xiaojing

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