Unit of Velocity!

Dear All,

May I make an enquiry? I am calculating the kinetic energy of five hydrogen molecules, hiting the oxygenated functional groups on the surface of reduced graphene oxide (RGO). In my input script, I put those five hydrogen molecules into region named h2 and set velocity as 0.3. My original setting is ‘velocity h2 set 0.0 0.0 0.3 sum no units box’. Would anyone kindly tell me the unit of velocity? Is the velocity 0.3 Angstroms/Femtosecond or not?

Thanks in advanced!


Depends on the units used. Please see http://lammps.sandia.gov/doc/units.html