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A CONJUGATE MODEL FOR BUBBLE GROWTH IN LOW-VELOCITY SUBCOOLED FLOWS
Heat Transfer Research ( IF 1.7 ) Pub Date : 2020-01-01 , DOI: 10.1615/heattransres.2020034568
Maryam Medghalchi , Nasser Ashgriz

A model for the growth of a bubble on a horizontal heated surface with a constant temperature and in a subcooled condition is presented. The model considers microlayer evaporation, transient thermal boundary layer conduction, and surface condensation or evaporation. The bubble growth time is divided into several stages, and the equation describing the bubble growth is simplified for different stages using a new characteristic time, and a new characteristic size. Several analytical solutions for the bubble growth are obtained at the early stages of the bubble growth and before the bubble lifts off. It is shown that before a critical time, the bubble growth is mainly governed by microlayer evaporation, however after the critical time the bubble growth is controlled by surface evaporation.

中文翻译:

低速过冷流动中气泡增长的共轭模型

提出了在恒温和过冷条件下,气泡在水平加热表面上生长的模型。该模型考虑了微层蒸发,瞬态热边界层传导以及表面凝结或蒸发。气泡生长时间分为几个阶段,并且使用新的特征时间和新的特征尺寸,简化了描述气泡生长的方程式以用于不同阶段。在气泡生长的早期和气泡升起之前,已经获得了几种用于气泡生长的分析解决方案。结果表明,在临界时间之前,气泡的生长主要受微层蒸发的控制,但是在临界时间之后,气泡的生长由表面的蒸发控制。
更新日期:2020-01-01
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