【摘要】 气泡是典型的介尺度结构之一，其结构演化过程对多相流动和热质传递特性有着不可忽视的影响。在许多工业过程中，气泡在促进混合、传热和传质速率方面有着重要影响。本文通过数值模拟，研究湿颗粒流化床中双气泡之间相互作用，分析其宏观流动特性以及介观演化过程。在本文中，其中一侧气泡生长过程受到抑制，而另外一侧气泡以更高的气泡比、更快地向上移动，这一现象与实验结果 (Physical Review Fluids, 2019, 4(3):034303)一致。随着液体含量的增加，气泡的演化过程受到抑制，气泡的尺寸、形状和生长速度减小，气泡边界更加不规则。更多还原

【Abstract】 Bubble is a typical mesoscale structure, and has attracted more and more attention due to its various meso-scale structure evolution. In many industrial processes, bubbles are also important in promoting mixing, heat, and mass transfer rates. In this work, interaction between two bubbles and evolution processes are analyzed from macro, meso scales by numerical simulation.An interesting phenomenon of two bubble interaction and collapsing is found. Two bubbles rise with different growth rate, although two bubble are injected and generated at the same time. This phenomenon agrees with the experimental results(Physical Review Fluids, 2019, 4(3): 034303). The left bubble inhibits and squeezes the right bubble, which results in the right bubble moving upwards faster with a higher bubble shape ratio. With an increase of liquid content, bubble evolution processes are inhibited, and the bubble size, shape and growth rate are reduced and become more irregular.更多还原