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DOI: 10.1615/ICHMT.2000.TherSieProcVol2.500
129 pages

Henrik Gjerkes
University of Ljubljana, Faculty of Mechanical Engineering, Askerceva 6, Ljubljana, Slovenia

Iztok Golobic
Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, Ljubljana, 1000, Slovenia


The influence of decreasing the distance between artificially activated nucleation sites and a naturally activated nucleation site on their activity was studied. A naturally activated nucleation site was activated during saturated water pool boiling at atmospheric pressure using electrical or laser heating of a relatively large surface of 25 μm copper or titanium foil. The interaction between nucleation sites located at various distances was observed during their simultaneous activation with a laser heated spot, which could be moved along the surface. The results of measurements indicate that the influences of active nucleation sites on each other's activity are mutual. Moving a laser heated spot along the surface was used to show the influence of location on the activity of nucleation sites.

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