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| Physics Today |
Once initiated, a combustion reaction can typically sustain itself until it runs out of fuel: Reacting molecules generate heat, heat incites more molecules to react, and the cycle repeats. But in small spaces such as microscopic bubbles, surface interactions drain away heat faster than combustion can generate it. For that reason, many people consider microscale combustion a physical impossibility. Though microbubbles may indeed be too small to combust, a University of Twente team led by Miko Elwenspoek has now discovered that, counterintuitively, nanobubbles aren’t.
A (somewhat) Related Link: Animated Engines
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