55 lines
1.1 KiB
Plaintext
55 lines
1.1 KiB
Plaintext
# Demonstrate MLIAP/PyTorch interface to linear SNAP potential
|
|
|
|
# Initialize simulation
|
|
|
|
variable nsteps index 100
|
|
variable nrep equal 4
|
|
variable a equal 3.316
|
|
units metal
|
|
|
|
# generate the box and atom positions using a BCC lattice
|
|
|
|
variable nx equal ${nrep}
|
|
variable ny equal ${nrep}
|
|
variable nz equal ${nrep}
|
|
|
|
boundary p p p
|
|
|
|
lattice bcc $a
|
|
region box block 0 ${nx} 0 ${ny} 0 ${nz}
|
|
create_box 1 box
|
|
create_atoms 1 box
|
|
|
|
mass 1 180.88
|
|
|
|
# choose potential
|
|
|
|
pair_style mliap model mliappy Ta_ACE.mliap.pytorch.model.pt descriptor ace linear_ACE_ccs.yace
|
|
pair_coeff * * Ta
|
|
|
|
# Setup output
|
|
|
|
compute eatom all pe/atom
|
|
compute energy all reduce sum c_eatom
|
|
|
|
compute satom all stress/atom NULL
|
|
compute str all reduce sum c_satom[1] c_satom[2] c_satom[3]
|
|
variable press equal (c_str[1]+c_str[2]+c_str[3])/(3*vol)
|
|
|
|
thermo_style custom step temp epair c_energy etotal press v_press
|
|
thermo 10
|
|
thermo_modify norm yes
|
|
|
|
# Set up NVE run
|
|
|
|
timestep 0.5e-3
|
|
neighbor 1.0 bin
|
|
neigh_modify once no every 1 delay 0 check yes
|
|
|
|
# Run MD
|
|
|
|
velocity all create 300.0 4928459 loop geom
|
|
fix 1 all nve
|
|
run ${nsteps}
|
|
|