I have a quick question. I have read the manual about velocity command and fix momentum command.
Right now I am creating the initial velocity such as:
velocity all create 300 3183284 # Create random velocity distribution using random seed
Does this necessarily mean that the net momentum(linear and angular) of my system is 0? Or do I have to enforce fix momentum command to ensure that the net momentum(linear and angular) is 0?
In case you need more details, I am trying to calculate the thermal conductivity of c-Si and a-Si with S-W potential under periodic boundary conditions.