Abstract
The flow distribution and mass transfer for gas-liquid flow in two parallel microchannels with different tree-shaped distributor are studied. Two parallel microchannels, both consist of four parallel branches, operated in the slug flow and with Reynolds number in the range of 0.2-10. The operating range in the halving-width microchannel (Tree-1) is significantly narrower than the constant-width microchannel (Tree-2). As the ratio of gas-liquid flow rate increases, the flow distribution in the Tree-1 gradually deteriorates. While in the Tree-2, there exists a critical ratio of gas-liquid flow rate to attain ideal flow distribution. Meanwhile, the volumetric mass transfer coefficient in the Tree-1 is lower, while in the Tree-2, the opposite is true. However, the high mass transfer coefficient is always accompanied by the high pressure drop. The pressure drop in the Tree-2 is higher than the Tree-1. Furthermore, the performance ratio is adopted to evaluate the mass transfer performance.
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