[lammps-users] Pressure

Dear all,

When we write a code to simulate some materials such as Silicon, we don't
check the pressure of the system for NVE ensemble. Because the atoms are
initialized in their right positions.

I think the LAMMPS changes the pressure of system for NVE ensemble because
I couldn't get the same results for the pressure.

Is it right? If yes, Should I use the NPT ensemble to go back to the
desired pressure?
Is it necessary for every simulation?

Any help would be appreciated.


If you run a solid with NVE and at a finite temperature,
then the pressure will fluctuate. That's true even in NPT.