Recently,I meet a question about 'compute ke/atom' command. I want to dump the kinetic energy of per atom in the simulation box, so I used the command as follows:
>>>compute kinetic all ke/atom
>>>dump 1 all custom 100000 E.dat c_kinetic
There are 72000 atoms in the simulation box. I think I only dumped c_kinetic once at step 100000, and should get 72000 energy data in E.dat, but actually I got 648072 data in E.dat.
I have read the manual of LAMMPS. Within the limits of my knowledge, kinetic energy of per-atom is a per-atom scalar quantity, but why this compute calculates a per-atom vector? What should I do to understand the data in E.dat?