Numerical simulation of bubble merger process on a single nucleation site during pool nucleate boiling
Numerical simulation of bubble merger process on a single nucleation site during pool nucleate boiling
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DOI：
10.1115/1.1420713
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发表时间：
2002-02-01
影响因子：
--
通讯作者：
Dhir, VK
中科院分区：
文献类型：
--
作者：
Son, G;Ramanujapu, N;Dhir, VK
通过数值求解汽、液相质量守恒、动量守恒和能量守恒方程，研究了单个成核点上的汽泡合并过程。采用水平集方法捕捉汽液界面，可以方便地处理界面的断裂和合并。水平集方法进行了修改，包括在界面处的相变和接触角在壁的影响。同时，考虑了气泡附壁面下形成的液膜的蒸发热通量，通过数值模拟，定量分析了气泡合并对汽体去除率、流场和传热的影响，并与实验结果进行了比较。
A bubble merger process on a single nucleation site has been investigated by numerically solving the equations governing conservation of mass, momentum and energy in the vapor and liquid phases. The vapor-liquid interface is captured by a level set method which can easily handle breaking and merging of the interface. The level set method is modified to include the effects of phase change at the interface and contact angle at the wall. Also, the evaporative heat flux from the thin liquid film that forms underneath a growing bubble attached to the wall is incorporated in the analysis, Based on the numerical simulations, the effect of bubble merger on vapor removal rate, flow field and heat transfer has been quantified, The bubble merger pattern predicted numerically has been found to compare well with the experimental observations.