MOLECULAR-DYNAMICS, SMOOTHED-PARTICLE APPLIED MECHANICS, AND IRREVERSIBILITY

We explore the relationship of Monaghan's version of ''smoothed-partic le hydrodynamics,'' here called ''smoothed-particle applied mechanics, '' to nonequilibrium molecular dynamics. We first use smoothed particl es to model the simplest possible linear transport problems, as well a s a liquid-drop problem. We then consider both gas-phase and dense-flu id versions of Rayleigh-Benard convection, all in two space dimensions . We also discuss the possibility of combining the microscopic and mac roscopic techniques in a hybrid scheme well-suited to the massively-pa rallel modelling of large-scale nonequilibrium flows.