CFD modelling of mass transfer in liquid-liquid core-annular flow in a microchannel

The Computational Fluid Dynamics (CFD) is now increasingly being used for modeling industrial flows, i.e. flows which are multiphase and turbulent. Numerical modeling of flows where momentum, heat and mass transfer occurs at the interface presents various difficulties due to the wide range of mechanisms and flow scenarios present. This paper attempts to provide a summary of available mathematical models and techniques for two-phase flows. Some comments are also made on the models available in the commercially available codes.

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CFD modelling of two-phase gas–liquid annular flow in terms of void fraction for vertical down- and up-ward flow

SN Applied Sciences ◽

10.1007/s42452-019-1430-3 ◽

2019 ◽

Vol 1 (11) ◽

Cited By ~ 3

Author(s):

A. Pinilla ◽

E. Guerrero ◽

D. H. Henao ◽

D. V. Reyes ◽

E. Pereyra ◽

...

Keyword(s):

Void Fraction ◽

Annular Flow ◽

Cfd Modelling ◽

Two Phase

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Investigations of mass transfer in annular gas-liquid flow in a microreactor

Chemical and Process Engineering ◽

10.1515/cpe-2016-0006 ◽

2016 ◽

Vol 37 (1) ◽

pp. 55-64 ◽

Cited By ~ 5

Author(s):

Paweł Sobieszuk ◽

Karolina Napieralska

Keyword(s):

Mass Transfer ◽

Cross Section ◽

Chemical Reaction ◽

Liquid Flow ◽

Annular Flow ◽

Gas Flow ◽

Absorption Rate ◽

Transfer Coefficients ◽

Water Solutions ◽

Gas Liquid Flow

Abstract The paper presents an investigation of mass transfer in gas-liquid annular flow in a microreactor. The microreactor had a meandered shape with a square cross-section of the channel (292×292 μm, hydraulic diameter 292 μm) and 250 mm in length. The rate of CO2 absorption from the CO2/N2 mixture in NaOH (0.1 M, 0.2 M, 0.7 M, 1.0 M and 1.5 M) water solutions was measured. Two velocities of gas flow and two velocities of liquid flow were used. In two cases a fully developed annular flow at the beginning of the channel was observed, whilst in two cases annular flow was formed only in about 2/3 of the microchannel length. Based on the measurements of CO2 absorption rate, the values of volumetric liquid - side mass transfer coefficients with the chemical reaction were determined. Then physical values of coefficients were found. Obtained results were discussed and their values were compared with the values predicted by literature correlations.

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CFD modelling of mass transfer with and without chemical reaction in the liquid–liquid slug flow microreactor

Chemical Engineering Science ◽

10.1016/j.ces.2007.01.068 ◽

2007 ◽

Vol 62 (18-20) ◽

pp. 5102-5109 ◽

Cited By ~ 60

Author(s):

M.N. Kashid ◽

D.W. Agar ◽

S. Turek

Keyword(s):

Mass Transfer ◽

Chemical Reaction ◽

Slug Flow ◽

Liquid Slug ◽

Cfd Modelling ◽

Flow Microreactor

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CFD modelling of mass transfer and interfacial phenomena on single droplets

Computer Aided Chemical Engineering - European Symposium on Computer-Aided Process Engineering-15, 38th European Symposium of the Working Party on Computer Aided Process Engineering ◽

10.1016/s1570-7946(05)80139-7 ◽

2005 ◽

pp. 103-108

Author(s):

Sylvia Burghoff ◽

Eugeny Y. Kenig

Keyword(s):

Mass Transfer ◽

Interfacial Phenomena ◽

Cfd Modelling ◽

Single Droplets

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Liquid-Liquid Two-Phase Flow Patterns and Mass Transfer Characteristics in a Circular Microchannel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.89 ◽

2012 ◽

Vol 482-484 ◽

pp. 89-94

Author(s):

Xu Bin Zhang ◽

Dan Chen ◽

Yan Wang ◽

Wang Feng Cai

Keyword(s):

Mass Transfer ◽

Annular Flow ◽

Flow Patterns ◽

Immiscible Fluids ◽

Viscous Force ◽

Inertia Force ◽

Transfer Coefficients ◽

Two Phase ◽

Transfer Characteristics ◽

Circular Microchannel

In this paper, flow patterns and mass transfer characteristics of two immiscible fluids in a T-junction circular microchannel were investigated. Four flow patterns, i.e. slug flow, irregular flow, parallel flow and annular flow, were captured by a CCD method, which were resulted from the competition among interfacial tension, viscous force and inertia force. Besides, the overall volumetric mass transfer coefficients ka for the four flow patterns was determined experimentally. The values of ka are in the range of 0.006~0.545s−1 and mainly dependent on the superficial velocity and the flow pattern regime.

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