Abstract
AbstractThe effect of Teflon spot treatment of the heating surface on nucleate boiling under flow conditions has been investigated. This effect is found to be complicated, varying strongly with temperature difference and degree of sub‐cooling. In general, for high degrees of subcooling, there is some improvement in the heat transfer coefficient for Teflon‐treated surfaces at low temperature differences, and an opposite effect at high temperature differences. Teflon spot treatment does not produce any appreciable effect at very low degrees of subcooling. An attempt has been made to explain this complex effect of Teflon treatment, taking into account maximum and minimum bubble diameters and insulating effect of Teflon spots.
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