Originally Posted by Asmodian
Air has very little thermal mass to heat up and has a low heat capacity per mass, so it is incapable of absorbing much heat energy. Water is much better at absorbing heat and jetting it into the back of the core allows it to absorb the heat directly, not needing to transfer it. This is why the jets are important in all water blocks.
depends on how much air we're talking about. Ive got a 160psi air compressor in my garage and using the blow gun can cool two freshly welded (with a Mig) pieces of 1/8" steel from a few thousand degrees celcius to cool to the touch in seconds. I can't imagine how noisy air jets would be. Would make Delta or San Ace fans seem quiet.