Abstract

The mechanism of isolated bubble pool nucleate boiling of water is studied by a novel approach method using the developed MEMS thermal sensor. Local temperature variation below the isolated bubble was measured at six wall superheats in the experiments. Heat transfer from the heating surface and the superheated liquid layer was evaluated by the heat transfer simulation with the experimental results. The heat transfer analysis shows that the microlayer evaporation dominantly contributes to wall heat transfer in the isolated bubble boiling, and the contribution of the wall heat transfer to the bubble growth decreases with increasing wall superheat.

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