Numerical studies are performed to investigate the condensation behavior of single and multiple bubbles in subcooled boiling flow. An open-source code is developed to model the dynamic behavior of the bubbles in real-time. The Newtonian flow is considered and relative equations are solved employing a coupled Level Set (LS) and Volume of Fluid (VOF) method known as CLSVOF model according to the Pressure Implicit with Splitting of Operators (PISO) algorithm. Initially, the numerical findings were compared and verified by available experimental data. The result of a single bubble condensation revealed that the initial bubble size, the subcooling of liquid, and the velocity of the flow not only significantly affect the bubble deformation behavior, but also the rate of condensation. For multiple bubbles, the results revealed that due to interaction between bubbles, bubbles' dynamic condensation behavior is more complex compared to a single one. Due to this interaction, it is found that the rate of bubble condemnation and condensation process vary. Furthermore, the effects of the gradient velocity, gradient temperature, and gap between multiple bubbles on the rate of mass transfer through the condensation are studied. A critical gap between multiple bubbles is introduced. It is found that when $(H^{\ast }=H/D\ge 2)$ for different bubble diameters, the effect of bubbles interaction can be ignored. Here $H^{\ast }$ is a dimensionless gap of center-to-center of bubbles.

进行数值研究以研究过冷沸腾流中单个和多个气泡的冷凝行为。开发了一个开源代码来实时模拟气泡的动态行为。考虑牛顿流动并使用称为 CLSVOF 模型的耦合水平集 (LS) 和流体体积 (VOF) 方法根据带有算子分裂的压力隐式 (PISO) 算法求解相关方程。最初，数值结果通过可用的实验数据进行比较和验证。单气泡冷凝结果表明，初始气泡尺寸、液体过冷度和流动速度不仅显着影响气泡变形行为，而且对冷凝速率也有显着影响。对于多个气泡，结果表明，由于气泡之间的相互作用，与单个气泡相比，气泡的动态凝结行为更为复杂。由于这种相互作用，我们发现气泡排出和冷凝过程的速率不同。此外，还研究了梯度速度、梯度温度和多个气泡之间的间隙对通过冷凝的传质速率的影响。引入了多个气泡之间的临界间隙。发现当 研究了多个气泡之间的间隙对通过冷凝的传质速率的影响。引入了多个气泡之间的临界间隙。发现当 研究了多个气泡之间的间隙对通过冷凝的传质速率的影响。引入了多个气泡之间的临界间隙。发现当$(H^{＊}=H/D\ge 2)$对于不同的气泡直径，气泡相互作用的影响可以忽略不计。这里$H^{＊}$ 是气泡中心到中心的无量纲间隙。