[lammps-users] creating moving particle with non-zero temperature

Hi All,

I am trying to simulate the collision between a nanoparticle moving
through vacuum onto a surface. I have created the nanoparticle using
"lattice" and "region particle sphere ..." commands and can make it
move towards the surface with "velocity particle ..." however I also
need to give the particle some internal thermal energy. I can do this
with "velocity create ..." but then I lose the centre of mass motion.
Is it possible to create the particle with thermal and COM motions?

Any pointers would be greatly appreciated.


Paul Howes

Yes, it is certainly possible to provide internal thermal energy and center of mass motion. Try "velocity create," then "velocity set" with the "sum" option set to "yes." See: http://lammps.sandia.gov/doc/velocity.html