How to get position (x,y,z) for atoms in chunk?

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1

Hello! all!

I am wondering if lammps has function to get get position (x,y,z) for atoms in chunk?

My data have chunk 0, 1, 2, 3.

And I want to have positions of each atoms of chuck 2 & 3.

Finally, I want to get a file the positions by using fix command or dump file.

I know chunk can give center of mass(COM) and MSD for each chunk.

However, I want to get the each atom’s postions of each chunk.

Does the function exist in lammps?

2

You can dump the positions of all atoms

along with their chunk ID.
Then post-process to only keep the atoms
you want.

Or you can define

a group that has only the atoms in chunks 2.3,

by using an atom-style variable and the group

variable option. If you use that group wtih

the dump, you’ll only get those atoms in

the dump file.

Steve