[lammps-users] the forces on particles in a fluid


In the simulation, the fluid motion is induced by force. How does the force correspond to the actual medium pressure?

Is it through F=△P*S, and then it distributes the force to the particles inside?

Shuai Zhang

pressure in LAMMPS is “computed” by compute pressure
for details on how and what it represent, please see the corresponding documentation in the LAMMPS manual and the referenced publication and suitable text books.



I should add that pressure is a diagnostic and has thus no direct impact on forces.
it won’t affect the outcome of a simulation unless you couple something to it, e.g. in fix npt or fix press/berendsen which will modify box dimensions.