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########################################################################

# Energy in eV, time in fs, distance in angstroms.

units                real
boundary  p p p  
atom_style        charge
read_data  RDX-Al.data

variable pe equal pe
variable ke equal ke
variable p equal (pxx+pyy+pzz)/3
variable temp equal temp
variable step equal step
compute ke all ke/atom

# Create region for wall.
region RDX-Al-Sphere sphere 125 125 125 60 units box
region O2-Wall sphere 125 125 125 62.5 side out  units box

#Define force field
pair_style        reax/c lmp_control checkqeq yes safezone 3 mincap 600
pair_coeff        * * ffield.reax.CHONAl C H O N Al  #CHON

mass 1 12.0
mass 2 1.008
mass 3 15.999
mass 4 14.000
mass 5 26.982

neighbor        2 bin
neigh_modify        every 1 delay 0 check no

fix  1  all qeq/reax 1 0.0 10.0 1e-6 reax/c

###### Static relaxation at 0 K #########
timestep       0.1
thermo 100
thermo_style custom step temp lx ly lz vol press pe ke etotal
thermo_modify lost ignore

min_style   cg
minimize   1.0e-6  1.0e-8   5000  100000

######## Establish wall so that RDX-Al will not interact with O2 ###########
fix  wall all wall/region RDX-Al-Sphere lj126 1.0 1.0 2.5

####### Dynamic relaxation at 1500 K ###########
reset_timestep 0
restart 10000   *.restart


fix  bond  all  reax/c/bonds 1000 Decomposition.reax
dump 1 all custom 1000  Decomposition.lammpstrj id type x y z q
fix plot1 all ave/time 1 1000 1000  v_temp v_pe v_ke v_p file Decomposition.txt

velocity   all create 3500.0 9999
fix  nvt all nvt temp 3500.0 3500.0 10.0

run       100000
2Â¥2021-02-04 11:28:39
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