Advanced

The effect of the size of square microchannels on hydrodynamics and mass transfer during liquid-liquid slug flow

Sattari-Najafabadi, Mehdi LU ; Nasr Esfahany, Mohsen; Wu, Zan LU and Sundén, Bengt LU (2017) In AIChE Journal 63(11). p.5019-5028
Abstract

The present study investigated the influence of square microchannel (MC) size on hydrodynamics and mass transfer in the liquid-liquid slug flow regime. Three square MCs with the hydraulic diameters of 200, 400, and 600 μm were used. The employed method for estimating mass-transfer coefficients remarkably increased the accuracy of the results. The findings revealed that decreasing the MC size improved the interfacial area due to plug length enlargement and deteriorated mass-transfer resistances because of augmented internal circulations, leading to the considerable enhancement of mass-transfer coefficients. The increasing effect on the overall mass-transfer coefficient became greater with flow velocity, showing that size effect on... (More)

The present study investigated the influence of square microchannel (MC) size on hydrodynamics and mass transfer in the liquid-liquid slug flow regime. Three square MCs with the hydraulic diameters of 200, 400, and 600 μm were used. The employed method for estimating mass-transfer coefficients remarkably increased the accuracy of the results. The findings revealed that decreasing the MC size improved the interfacial area due to plug length enlargement and deteriorated mass-transfer resistances because of augmented internal circulations, leading to the considerable enhancement of mass-transfer coefficients. The increasing effect on the overall mass-transfer coefficient became greater with flow velocity, showing that size effect on mass-transfer resistances was more profound at higher flow velocities. The influence of size on the interfacial area was significantly greater than that on mass-transfer resistances due to the significant increment of wall film length with the decrease in channel size.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
diameter, interfacial area, mass-transfer coefficient, microchannel, slug flow
in
AIChE Journal
volume
63
issue
11
pages
10 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:85019281099
  • wos:000412727500024
ISSN
0001-1541
DOI
10.1002/aic.15822
language
English
LU publication?
yes
id
098af19f-da8f-4442-a284-f7e5f313afb0
date added to LUP
2017-11-22 13:02:34
date last changed
2018-01-16 13:26:19
@article{098af19f-da8f-4442-a284-f7e5f313afb0,
  abstract     = {<p>The present study investigated the influence of square microchannel (MC) size on hydrodynamics and mass transfer in the liquid-liquid slug flow regime. Three square MCs with the hydraulic diameters of 200, 400, and 600 μm were used. The employed method for estimating mass-transfer coefficients remarkably increased the accuracy of the results. The findings revealed that decreasing the MC size improved the interfacial area due to plug length enlargement and deteriorated mass-transfer resistances because of augmented internal circulations, leading to the considerable enhancement of mass-transfer coefficients. The increasing effect on the overall mass-transfer coefficient became greater with flow velocity, showing that size effect on mass-transfer resistances was more profound at higher flow velocities. The influence of size on the interfacial area was significantly greater than that on mass-transfer resistances due to the significant increment of wall film length with the decrease in channel size.</p>},
  author       = {Sattari-Najafabadi, Mehdi and Nasr Esfahany, Mohsen and Wu, Zan and Sundén, Bengt},
  issn         = {0001-1541},
  keyword      = {diameter,interfacial area,mass-transfer coefficient,microchannel,slug flow},
  language     = {eng},
  month        = {11},
  number       = {11},
  pages        = {5019--5028},
  publisher    = {Wiley-Blackwell},
  series       = {AIChE Journal},
  title        = {The effect of the size of square microchannels on hydrodynamics and mass transfer during liquid-liquid slug flow},
  url          = {http://dx.doi.org/10.1002/aic.15822},
  volume       = {63},
  year         = {2017},
}