I am a new Lammps user and was trying to understand the software.
I wanted to check whether while doing the 2d simulation LAMMPS is solving equations in all 3 dimensions with periodic boundary conditions in the 3rd direction or not. So I removed the fix enforce2d command in the flow example and dumped the velocity and force values in the 3rd direction onto a file. But, I was getting all the values as zeroes.
Its my understanding the enforce command initializes the force and velocity values to zero after every time step.