Focused heat removal where you need it.
Although I'd presume the particles are encapsulated to prevent settling and forming a lump in the low points of the systems.
Personally I've always wondered about about a sort of "liquid crankshaft" linking the cylinders on an internal combustion engine. The system acting as a regular hydraulic system with 1 way valves to keep the pistons cycling, then turning on the magnetism to shut down part of the engine (any part of the engine) and let the rest of the cylinders run.
Handy (I though) for any big engine that runs a lot in traffic, where a lot of the time is spent on ideal.
Thumbs up for bringing this out.