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- W1985236871 abstract "We report a three-phase slug flow and a parallel-slug flow as two major flow patterns found under the nitrogen–decane–water flow through a glass microfluidic chip which features a long microchannel with a hydraulic diameter of 98 μm connected to a cross-flow mixer. The three-phase slug flow pattern is characterized by a flow of decane droplets containing single elongated nitrogen bubbles, which are separated by water slugs. This flow pattern was observed at a superficial velocity of decane (in the range of about 0.6 to 10 mm s−1) typically lower than that of water for a given superficial gas velocity in the range of 30 to 91 mm s−1. The parallel-slug flow pattern is characterized by a continuous water flow in one part of the channel cross section and a parallel flow of decane with dispersed nitrogen bubbles in the adjacent part of the channel cross section, which was observed at a superficial velocity of decane (in the range of about 2.5 to 40 mm s−1) typically higher than that of water for each given superficial gas velocity. The three-phase slug flow can be seen as a superimposition of both decane–water and nitrogen–decane slug flows observed in the chip when the flow of the third phase (viz. nitrogen or water, respectively) was set at zero. The parallel-slug flow can be seen as a superimposition of the decane–water parallel flow and the nitrogen–decane slug flow observed in the chip under the corresponding two-phase flow conditions. In case of small capillary numbers (Ca ≪ 0.1) and Weber numbers (We ≪ 1), the developed two-phase pressure drop model under a slug flow has been extended to obtain a three-phase slug flow model in which the ‘nitrogen-in-decane’ droplet is assumed as a pseudo-homogeneous droplet with an effective viscosity. The parallel flow and slug flow pressure drop models have been combined to obtain a parallel-slug flow model. The obtained models describe the experimental pressure drop with standard deviations of 8% and 12% for the three-phase slug flow and parallel-slug flow, respectively. An example is given to illustrate the model uses in designing bifurcated microchannels that split the three-phase slug flow for high-throughput processing." @default.
- W1985236871 created "2016-06-24" @default.
- W1985236871 creator A5013497982 @default.
- W1985236871 creator A5023364501 @default.
- W1985236871 creator A5081627735 @default.
- W1985236871 date "2014-01-01" @default.
- W1985236871 modified "2023-10-18" @default.
- W1985236871 title "Gas–liquid–liquid three-phase flow pattern and pressure drop in a microfluidic chip: similarities with gas–liquid/liquid–liquid flows" @default.
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- W1985236871 doi "https://doi.org/10.1039/c3lc51307f" @default.
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