Dissolution of carbon dioxide bubbles and microfluidic multiphase flows.
Dissolution of carbon dioxide bubbles and microfluidic multiphase flows.
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DOI：
10.1039/c1lc20348g
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发表时间：
2011-08
期刊：
影响因子：
6.1
通讯作者：
Ruopeng Sun;T. Cubaud
中科院分区：
文献类型：
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作者：
Ruopeng Sun;T. Cubaud
我们实验研究了二氧化碳气泡溶解到普通液体（水，乙醇和甲醇）使用微流控装置。细长的气泡是单独产生的使用流体动力学聚焦部分到一个紧凑的微通道。初始气泡尺寸基于注射的流体体积流速和通道几何形状来确定。相反，气泡的溶解速率被发现依赖于入口气体压力和流体对的组成。在流体初始接触后的短时间内，气泡长度随时间线性减小。我们表明，气泡收缩的初始速率是成比例的扩散系数和亨利定律常数与每个流体对的比率。我们的研究表明，使用微流体技术在短距离内用CO（2）快速溶解液体的可能性。
We experimentally study the dissolution of carbon dioxide bubbles into common liquids (water, ethanol, and methanol) using microfluidic devices. Elongated bubbles are individually produced using a hydrodynamic focusing section into a compact microchannel. The initial bubble size is determined based on the fluid volumetric flow rates of injection and the channel geometry. By contrast, the bubble dissolution rate is found to depend on the inlet gas pressure and the fluid pair composition. For short periods of time after the fluids initial contact, the bubble length decreases linearly with time. We show that the initial rate of bubble shrinkage is proportional to the ratio of the diffusion coefficient and the Henry's law constant associated with each fluid pair. Our study shows the possibility to rapidly impregnate liquids with CO(2) over short distances using microfluidic technology.