1. In the example of Poisseuille flow, the flow is created by addforce command applied to every atoms. This means that the flow has body force driven and is not pressure driven. Is this correct? How do I create a pressure driven flow?
2. How do I add force to atoms present in a particular geometric region at any given time rather than to atom belonging to a particular group? Basically, I want to add force to atoms only at the entrance of the simulation box on one side and then let them move across the box.
Bhavin N. Vadgama