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首页> 外文期刊>International Journal of Heat and Mass Transfer >Dynamics of a vapor bubble on a heated substrate
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Dynamics of a vapor bubble on a heated substrate

机译：加热后的基材上蒸气气泡的动力学

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摘要

The dynamics of a vapor bubble between its liquid phase and a heated plate is studied in relation to the breakdown and recovery of the film boiling. By examining the expansion and the contraction of the vapor bubble the film boiling and transition boiling states are predicted. Conservation laws in the vapor, solid, and liquid phases are invoked along with fully nonlinear, coupled, free boundary conditions. These coupled system of equations are reduced to a single evolution equation for the local thickness of the vapor bubble by using a long-wave asymptotics, which is then solved numerically to yield the transient motion of the vapor bubble. Of the numerous parameters involved in this complex phenomenon we focus on the effects of the degree of superheat from the solid plate, that of the supercooling through the liquid, and the wetting/dewetting characteristics of the liquid on the solid plate. A material property of the substrate thus is incorporated into the criteria for the film boiling based on hydrodynamic models.
机译：研究了汽泡在其液相和加热板之间的动力学，与薄膜沸腾的分解和恢复有关。通过检查气泡的膨胀和收缩，可以预测膜的沸腾和过渡沸腾状态。气相，固相和液相的守恒定律与完全非线性，耦合的自由边界条件一起被调用。通过使用长波渐近线，将这些耦合的方程组简化为蒸气泡局部厚度的单个演化方程，然后对其进行数值求解，以产生蒸气泡的瞬态运动。在涉及这种复杂现象的众多参数中，我们重点关注固体板的过热度，通过液体的过冷度以及液体在固体板上的润湿/去湿特性的影响。因此，基于流体动力学模型，将基材的材料性能纳入薄膜沸腾的标准中。

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