I m a beginner at LAMMPS. So I have tested Couette flow from Couette flow Example case.
In 2D case, I could get the linear velocity profile by revied some commands.
In 3D case, I could not get the linear velocity profile although I just converted the commands from 2D to 3D.
When I changed the ensemble from nve to nvt, I could get the linear velocity profile, but the upper wall velocity did not reach the set value.
Which part is wrong?
Code 1 is nve and code 2 is nvt.
Somebody, help me please.