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Thermally controlled bubble collapse in binary solutions

机译:二元溶液中的热控气泡破裂

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This paper theoretically analyzes thermally controlled bubble collapse in binary solutions. Using a finite difference approach with an adaptive grid, three aspects of bubble collapse are investigated: counter-diffusion, initial bubble diameter, and absorber cooling rate. Results illustrate how counter-diffusion of the absorbent, acting to preserve the bubble life span, is offset by convective mass transfer arising from bubble interface motion. Predicted bubble mass transfer rates for an ammonia water system increase with the square of the bubble radius (diameters: l.8-5.6 mm) and with increased absorber cooling rates. Model predictions compare well with simple semi-empirical correlations for bubble heat and mass transfer coefficients.
机译:本文从理论上分析了二元溶液中的热控气泡破裂。使用带有自适应网格的有限差分方法,研究了气泡破裂的三个方面:反扩散,初始气泡直径和吸收器冷却速率。结果表明,吸收剂的反向扩散如何起到保持气泡寿命的作用,如何通过气泡界面运动引起的对流传质来抵消。氨水系统的预计气泡传质速率随气泡半径的平方(直径:1.8-5.6毫米)和吸收塔冷却速率的增加而增加。模型预测与气泡热和传质系数的简单半经验相关性很好地比较。

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