[lammps-users] pressure

Hello

When I simulate a crystal, pressure oscillates between -15000 to 15000 bars!

How can I reach to true pressure?

Thanks

Hi, esi.You can do the simulation under the NPT environment. Just try to use the ‘fix npt …’
Good luck!

Hi, esi.You can do the simulation under the NPT environment. Just try
to use the 'fix npt ..'

sorry, but that won't help much. this is about the pressure
_fluctuation_ and it did seem to fluctuate around 0. so that
is what it should do. running in npt might dampen those
fluctuations a bit, but in a crystal there _should_ be
large pressure fluctuations due to is very small compressibility
and for the kind of small system that you can with classical MD
(even though the post didn't say how large the system was).

cheers,
   axel.