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Visualization of internal liquid flow interactions in meso planar structures

机译:细观平面结构中内部液体流动相互作用的可视化

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Transparent and planar meso-scale fluidic structures with no movable parts, based on feedback microfluidic oscillators, were manufactured in acrylic (using a computer numerically controlled milling machine) and sealed using thermo-compressive bonding. Internal flow images for the operation with water were analyzed considering supply flows in the range of 60 ml/min to 600 ml/min. Tracers with different viscosities were injected (continuously or in a pulsed way) to improve contrast. Depending on the constriction dimensions at the output of the feedback arms, these structures can present different behaviors associated with momentum interaction, and can be used for different applications. Smaller constrictions lead to structures that oscillate in any flow regime (1000 < Re < 10,000) while larger ones avoid oscillation but favor retention of fluid inside the feedback arms.
机译:基于反馈微流体振荡器的,没有活动部件的透明且平面的中尺度流体结构,是用丙烯酸(使用计算机数控铣床)制造的,并使用热压粘合进行密封。考虑到供应流量在60 ml / min至600 ml / min范围内的水,分析了内部水流图像。注入不同粘度的示踪剂(连续或以脉冲方式)以改善对比度。根据反馈臂输出处的收缩尺寸,这些结构可能会呈现出与动量相互作用相关的不同行为,并可用于不同的应用。较小的收缩会导致结构在任何流动状态下振荡(1000

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