While we are at this...and in fun.
they recently finished the modelling of the freezing of water and found that it is a multistage process (7 steps, iirc) all of which have to be undertaken in precisely the right order and under the right conditions, which are difficult to reproduce in the lab environment.
But as we know, water doesn't necessarily freeze (form ice) at 0 degrees and can be supercooled to -50 C without freezing simply by preventing one of those conditions necessary to the formation of ice.
Equally, we know that forming ice is a relatively simple experiment that occurs without any human interference.
So the ability for water to cool more rapidly from one state than from another shouldn't be all that surprising, it should be no more counter-intuitive than the presence of liquid water at temperatures that should freeze your blood.
Like the formation of ice, it will probably be found that cooling is actually a multi-stage process, much more complex than simply removing a source of heat.
However, given the fact that some of the nano-materials can transfer and give up heat faster than water, what's the betting that we will soon see engines with 'solid' cooling systems in F1, ie engines with coolant galleries and radiators but no pumps, pressure systems etc.
Or will they all be ceramic and operate at 2000C, like turbines?
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