units real atom_style full bond_style harmonic angle_style harmonic dihedral_style harmonic boundary p p p neighbor 2.0 bin neigh_modify every 10 delay 0 check yes pair_style hybrid lj/cut/coul/cut 12.0 lj/cut/tip4p/cut 9 4 4 7 0.15 12.0 # ============= read data and parameters files================= read_data polyoxo-water.lammps include PARM.dat group water type 4 9 group ox type 9 group hy type 4 set group ox charge -1.04 set group hy charge 0.52 # ============= Perform minimization============== minimize 1e-12 1e-25 100000 100000 # ============= Initializing velocities=========== velocity all create 300 198728 dist gaussian mom yes rot yes timestep 1.0 thermo_style custom step time cpu temp pe ke etotal press vol thermo 1000 dump dump_1 all custom 500 dump.lammpstrj id type x y z ix iy iz vx vy vz # ============= Perform NPT equlibration=========== fix myshk water shake 1.0e-5 200 0 b 4 a 7 fix mynpt all npt temp 300.0 300.0 100.0 iso 1.0 1.0 1000.0 run 100000 unfix mynpt