Here is an old test i did for G.I. Joe - Rise of Cobra in 2009 that was shown at Siggraph (otherwise i couldn't share it with you!).
PrimeFocus handled the Nightraven jet dissolve by nanomites amoung other scenes. This is a close up of the nanomite motion in the wind (the jet is doing Mach3 at least :D ). It is a fume simulation with wind forces as a driver and a Particle Flow Toolbox#3 setup for the shading and creeping along the surface following point helpers as "eating guides" and handling the shading based on proximity to the jet and speed of traveling. A data operator maps a gradient ramp on the particles based on all those factors.