title: Microscopic and macroscopic stress with gravitational and rotational forces.
abstract: Many recent papers have questioned Irving and Kirkwood's atomistic expression for stress. In Irving and Kirkwood's approach both interatomic forces and atomic velocities contribute to stress. It is the velocity-dependent part that has been disputed. To help clarify this situation we investigate (i) a fluid in a gravitational field and (ii) a steadily rotating solid. For both problems we choose conditions where the two stress contributions, potential and kinetic, are significant. The analytic force-balance solutions of both these problems agree very well with a smooth-particle interpretation of the atomistic Irving-Kirkwood stress tensor.
authors.affiliation: Ruby Valley Research Institute, Highway Contract 60, Box 598, Ruby Valley, Nevada 89833, USA.
authors.forename: Wm G
authors.initials: WG
authors.lastname: Hoover
authors.forename: Carol G
authors.initials: CG
authors.lastname: Hoover
authors.forename: James F
authors.initials: JF
authors.lastname: Lutsko