The growth rate of vapour bubbles in superheated pure liquids and binary mixtures

摘要: Abstract Growth rates of bubbles, generated at a moderate heat flux density in nucleate boiling on an electrically heated platinum wire immersed water, and water-methylethylketone ( x 0 = 4·1 × 10 −2 ) water-1-butanol 1·5 6·0 mixtures, have been investigated. A high speed motion picture camera technique has used. The experimental values the growth constants C 1, p m for ascending released bubbles are generally quantitative agreement with theoretical predictions free e.g. occurrence minimal water-1-butanol. For investigated mixture, decreased 0·20 R 0·35 occur. However, several show unusual behaviour, i.e. higher or lower resulting from increased distance, respectively, their nearest neighbours. Sometimes observed, which oscillate both shape volume. In most cases, these vibrations not originating coalescence. amplitude oscillations decreases due to viscous damping gradually flattened. frequency important mode vibration, slowest fundamental harmonic, is theory. Some film azeotropic water-ethanol hysteresis effect local liquid superheating observed.