  The influence of temperature on interfacial fluid slip, as measured by
molecular-dynamics simulations of a Couette flow comprising a Lennard-Jones
fluid and rigid crystalline walls, is examined as a function of the fluid-solid
interaction strength. As a result, two completely different thermal behaviors
are observed, namely, the slippery and sticky cases, which are characterized
respectively by unbounded decreasing and bounded increasing temperature
dependencies. A previously-proposed analytical model, predicting exponential
fluid-slip variations, is shown to well describe both behaviors and the
transition between them.
