[lammps-users] Negative pressure

Hello Users,

I am simulating a nanotube using REBO potential on LAMMPS. I am getting good values for temperature.But the pressure is coming out to be negative. What does that really mean?? Does negative pressure make sense??

Thanks
Ajit

Yes, pressure can be negative or positive. As you expand/contract a system
its P will become more neg/pos.

Steve