A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations

•CFD model that couples multiphase, multicomponent and mass transfer physics developed.•Volume-of-fluid (VOF) used to capture multiphase physics.•Multicomponent species tracked within the correct phase.•Smoothing operations used to alleviate spurious velocities enable model’s use in micro-scale simu...

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Vydáno v:International journal of heat and mass transfer Ročník 113; s. 922 - 934
Hlavní autoři: Soh, Gim Yau, Yeoh, Guan Heng, Timchenko, Victoria
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Elsevier Ltd 01.10.2017
Elsevier BV
Témata:
Blood vessels
Carbon dioxide
Computational fluid dynamics
Computer simulation
Correlation analysis
Couples
Dissolution
Empirical analysis
Enhanced oil recovery
Expulsion
Heat transfer
Mass transfer
Micro-scale
Microchannels
Multiphase
Multiphase and multicomponent coupling
Multiphase flow
Scale (ratio)
Surface tension
Tracking
Transport
Two dimensional models
Volume-of-fluid (VOF)
Volume-of-fluid (VOF)
Multiphase and multicomponent coupling
Multiphase flow
Mass transfer
Micro-scale
ISSN:0017-9310, 1879-2189
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Shrnutí:•CFD model that couples multiphase, multicomponent and mass transfer physics developed.•Volume-of-fluid (VOF) used to capture multiphase physics.•Multicomponent species tracked within the correct phase.•Smoothing operations used to alleviate spurious velocities enable model’s use in micro-scale simulations.•Test cases conducted and establishes accuracy and reliability of model. This paper presents a CFD model that couples the physics of multiphase and multicomponent flow involving mass transfer for micro-scale simulations. The volume-of-fluid (VOF) model is utilised to capture the multiphase physics, and smoothing operations are applied in the surface tension force calculation to minimise spurious velocities. For multicomponent tracking of the species transport, the α-factor and expulsion operation methods are implemented to ensure that the species are tracked within the correct phase. Three different mass transfer models were adopted with modifications to the original models. The developed coupled multiphase-multicomponent model was assessed via a series of validation cases: a simple one-dimensional (1D) diffusion problem, horizontal vapour flow over a smooth stationary liquid where Sherwood number was used to measure mass transfer performance, and the dissolution of a two-dimensional (2D) droplet. In all the test cases, the model was able to yield reasonably close results with the analytical solution or empirical correlations used in the validation, thus establishing its accuracy and reliability of the developed model. Simulations using the coupled multiphase-multicomponent model represent a cost-effective approach to obtaining insights into the flow physics for a variety of applications: dissolution of droplets in microchannels, transport of drugs in blood vessels that entails mass transfer and simulations of carbon dioxide enhanced oil recovery at the pore-scale.
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ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2017.06.001