Characterization of Bubble Transport in Porous Media Using a Microfluidic Channel
Characterization of Bubble Transport in Porous Media Using a Microfluidic Channel
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DOI：
10.3390/w15061033
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发表时间：
2023-03
期刊：
影响因子：
3.4
通讯作者：
Ryan Haggerty;Dong Zhang;Jongwan Eun;Yusong Li
中科院分区：
文献类型：
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作者：
Ryan Haggerty;Dong Zhang;Jongwan Eun;Yusong Li
研究了水平微通道中不同流量和不同气泡尺寸对气液两相流动的影响。建立了一个简单的气泡产生系统，可以产生大小和频率可控的气泡，这些气泡直接流入填充了不同尺寸玻璃微珠的微流控通道。用高速摄像机对气泡流动进行可视化，并对气泡流动进行分析，以获得液含率的变化。测量了压力数据，以估计水力传导性。基于毛细管数和目视观察，多孔介质中气泡的驱替模式为粘性指进。较大的气泡导致气泡突破的归一化频率降低20%至60%。增大流速增大了气泡破壁过程中表观持液率的变化。较大的气泡和较低的流速使每个通道的相对渗透率分别降低了50%到57%和30%到。
This study investigates the effect on varying flow rates and bubble sizes on gas–liquid flow through porous media in a horizontal microchannel. A simple bubble generation system was set up to generate bubbles with controllable sizes and frequencies, which directly flowed into microfluidic channels packed with different sizes of glass beads. Bubble flow was visualized using a high-speed camera and analyzed to obtain the change in liquid holdup. Pressure data were measured for estimation of hydraulic conductivity. The bubble displacement pattern in the porous media was viscous fingering based on capillary numbers and visual observation. Larger bubbles resulted in lower normalized frequency of the bubble breakthrough by 20 to 60 percent. Increasing the flow rate increased the change in apparent liquid holdup during bubble breakthrough. Larger bubbles and lower flow rate reduced the relative permeability of each channel by 50 to 57 percent and 30 to 64 percent, respectively.