  Structurally-stable atomistic one-dimensional shockwaves have long been
simulated by injecting fresh cool particles and extracting old hot particles at
opposite ends of a simulation box. The resulting shock profiles demonstrate
tensor temperature, with the longitudinal temperature exceeding the transverse,
and Maxwell's delayed response, with stress lagging strainrate and heat flux
lagging temperature gradient. Here this same geometry, supplemented by a
short-ranged external "plug" field, is used to simulate steady Joule-Kelvin
throttling flow of hot dense fluid through a porous plug, producing a dilute
and cooler product fluid.
