Abstract
In the present report, boiling incipience is investigated for application of pool boiling for electronic device cooling. First, the effect of system subcooling preceding boiling incipience on the incipient wall superheat is experimentally investigated. The surface exposed to a subcooled state shows a considerable temperature overshoot before boiling incipience, and the incipient wall super-heat is independent of the degree of system subcooiling. It is shown that such results can be understood in terms of the stability theory of preexisting nuclei trapped in doubly re-entrant cavities. Next, the reduction of the temperature overshoot by impingement of gas bubbles upon the surface is examined. Results show that the temperature overshoot can be reduced and controlled by this method.
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