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Liquid-liquid extraction in laminar two-phase stratified flows in capillary microchannels
Published in Elsevier Ltd
2019
Volume: 195
   
Pages: 242 - 249
Abstract
In this work, we study the mass transfer of a solute in laminar, two-phase, stratified flow in a circular microchannel. The model developed in our earlier work (Picardo et al., 2015) has been used. We adopt a semi-analytical approach to model liquid-liquid extraction in the circular channel with stratified flow. A bipolar cylindrical coordinate system is employed for an elegant description of the boundaries in the form of iso-coordinate surfaces. The model developed for the circular channel is computationally intensive. We present a methodology to estimate the mass transfer predictions for the 2D circular channel from a 2D channel of rectangular cross-section and a 1D channel i.e. flow between infinite parallel plates. This is analyzed for different carrier phase holdups and fluid properties. It is found that the 1D model can accurately predict the performance of the capillary. Further, we conclude that a more viscous carrier phase results in enhanced mass transfer. © 2018 Elsevier Ltd
About the journal
JournalData powered by TypesetChemical Engineering Science
PublisherData powered by TypesetElsevier Ltd
ISSN00092509
Open AccessNo
Concepts (16)
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    Aerodynamics
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    Hydrodynamics
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    Liquids
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    Mathematical models
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    Microchannels
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    Solvent extraction
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    Thermal stratification
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    CIRCULAR MICROCHANNEL
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    CYLINDRICAL COORDINATE SYSTEMS
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    Cylindrical coordinates
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    Liquid-liquid extraction
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    RECTANGULAR CROSS-SECTIONS
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    SEMI-ANALYTICAL APPROACHES
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    Stratified flows
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    Two-phase stratified flows
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    MASS TRANSFER