水平布置等径气泡上升运动数值模拟分析

Analysis of numerical simulation on horizontal arrangement equal bubbles rising

采用FTM（Front Tracking Method）方法，使用Fortran语言自编程序，对气泡上升运动进行数值模拟，并且选用小气泡作为研究对象，忽略气泡变形对气泡运动的影响。通过对比分析1～4个气泡的流场与运动速度变化，发现气泡间相互作用主要受流场变化的影响，由于双气泡的漩涡抵消和尾迹合并作用，双气泡的终极速度要比单气泡小，而三个气泡和四个气泡向上运动时中间气泡超越两侧气泡之后逐渐表现为单气泡和双气泡的运动特性，但发展到终极速度的时间更长。

Numerical simulation of the bubbles＇ rising was analyzed with the method of FTM （Front Tracking Method） by selecting the tiny bubbles as the objects in Fortran language. The influences of bubbles＇ deformation on their movement were ignored. After contrasting and analyzing the changes of the flow field and velocity of one to four bubbles, the results showed that the interaction between the bubbles was mainly influenced by the changes of the flow field. The terminal velocity of double bubbles was lower than the single one on account of the vortex counteracting of former and wake merging effects. However, when three or four bubbles were moving upward, the central one would surpass the bilateral bubbles and behave like the single and double bubbles. But they took longer time to achieve the ultimate velocity accordingly.