Impact of flow feedback on bubble generation in T-junction microchannels under pressure-driven condition
Impact of flow feedback on bubble generation in T-junction microchannels under pressure-driven condition
复制标题
压力驱动条件下流量反馈对T形连接微通道气泡产生的影响
DOI：
10.1016/j.ces.2021.117010
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发表时间：
2021-12
影响因子：
4.7
通讯作者：
Zhaomiao Liu
中科院分区：
文献类型：
--
作者：
Yan Pang;Yao Lu;Xiang Wang;Qiang Zhou;Yanlin Ren;Zhaomiao Liu
在气体压力驱动条件下，对宽300 μm、高100 μm的不同类型T型微通道内气泡尺寸进行了实验研究。气泡长度随流速的增加而增加，并且我们观察到气泡长度也随驱动压力的增加而增加。这一点通过已发表的气泡流压差公式得到了证实。三种类型的下游通道正常，可移动，变形壁（不同长度）-被用来研究新兴的气泡，并观察到它们之间的非线性关系。通道类型通过影响气泡通道的阻力直接影响气泡的大小。此外，一个正常的通道和一个变形的通道具有相同的典型尺寸的阻力之间的差异被确定使用两个平行通道之间的比较器结构，以评估流动阻力对气泡生成的影响。下游流速的调节将对双T形连接通道中的气泡生成提供反馈。
Under pressure-driven conditions of gas, the bubble size was experimentally studied in different types of T-junction microchannels having widths of 300 μm and heights of 100 μm. The bubble length increases with the flow rate, and we observed that it also increased with the driving pressure. This was proved through the published formulas for the bubble flow pressure difference using the experimental results. Three types of downstream channels—normal, movable, and deformed walls (of different lengths)—were used to study emerging bubbles, and a nonlinear relationship was observed between them. The channel type directly influenced the bubble size by affecting the resistance of the channel with bubbles. Furthermore, the difference between the resistances of a normal channel and a deformed channel with the same typical dimension was determined using a comparator structure between two parallel channels to evaluate the effect of flow resistance on bubble generation. The adjustment of the flow rate at downstream will give feedback to the bubble generation in the double T-junction channel.
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3.5
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