Transport of bubbles in square microchannels
Transport of bubbles in square microchannels
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DOI：
10.1063/1.1813871
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发表时间：
2004-12-01
影响因子：
4.6
通讯作者：
Ho, CM
中科院分区：
文献类型：
--
作者：
Cubaud, T;Ho, CM
液体/气体流动的实验研究在200和525微米的玻璃和硅制成的方形微通道。液体和气体在十字形截面中混合，以产生稳定且均匀的单分散气泡流。两相流图和流型之间的过渡线进行了检查。测量了气泡速度和气液滑移率。讨论了流型及其特点。局部和全球干出的通道壁移动气泡在方形毛细管作为一个功能的部分润湿通道的流动特性进行了研究。测量两相流压降，并与单液流压降进行比较。考虑到均匀的液体部分沿着通道，两相流体阻力的表达式实验开发的液体和气体流量范围内的调查。(C)美国物理研究所。
Liquid/gas flows are experimentally investigated in 200 and 525 mum square microchannels made of glass and silicon. Liquid and gas are mixed in a cross-shaped section in a way to produce steady and homogeneous flows of monodisperse bubbles. Two-phase flow map and transition lines between flow regimes are examined. Bubble velocity and slip ratio between liquid and gas are measured. Flow patterns and their characteristics are discussed. Local and global dry out of the channel walls by moving bubbles in square capillaries are investigated as a function of the flow characteristics for partially wetting channels. Two-phase flow pressure drop is measured and compared to single liquid flow pressure drop. Taking into account the homogeneous liquid fraction along the channel, an expression for the two-phase hydraulic resistance is experimentally developed over the range of liquid and gas flow rates investigated. (C) American Institute of Physics.