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ÎÒÕÕ×ÅlammpsÀý×Ó×öë²µÄÈÛ»¯£¬±¨´íERROR: Illegal fix nvt/npt/nph command
# 2d Lennard-Jones melt

units             lj
atom_style        atomic

boundary          p p p
#processors       2 2 1

lattice           fcc 1.073
region            box block 0 8 0 8 0 5
create_box        1 box
create_atoms      1 box
mass              1 1.0

velocity          all create 10 872877
timestep          0.01

dump              1 all xyz 1000 dump.lammpstrj

pair_style        lj/cut 2.5
pair_coeff        1 1 1.0 1.0 2.5

neighbor          0.3 bin
neigh_modify      every 10 delay 0 check yes

thermo            1000

fix               1 all npt 10.0 10.0 2.0 xyz 1.0 1.0 1.0 drag 0.2
run               50000
unfix             1

thermo            1000

fix               1 all npt 10.0 10.0 2.0 zyz 1.0 1.0 1.0 drag 0.2

run               1000000
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fix 1 all npt 10.0 10.0 2.0 xyz 1.0 1.0 1.0 drag 0.2
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fix 1 all npt temp 10.0 10.0 2.0 iso 1.0 1.0 1.0 drag 0.2
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