Marangoni effect and its influence on the mass transfer in packings

When a viscous liquid is displaced by a long air bubble in a capillary, it leaves behind a wetting liquid film. A lubrication analysis by Bretherton (1961), which assumes a mobile surface, underpredicts the film thickness at low bubble speeds. In this investigation, the Marangoni effect of small amounts of impurities is shown to be capable of explaining this discrepancy. We carry out an asymptotic analysis for different convective, diffusive and kinetic timescales and show that, if transport in the film is mass-transfer limited such that a bulk concentration gradient exists in the film, the film thickness increases by a maximum factor of 4 2/3; over Bretherton's mobile result at low bubble speeds. Moreover, at large bubble speeds, Bretherton's mobile prediction is approached for all ranges of timescales. For intermediate bubble speeds, the film thickness varies with respect to the bubble speed with an exponent smaller than 2/3 of the mobile theory. These results are favourably compared to literature data on film thickness.

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Mass transfer in the case of interfacial turbulence induced by the marangoni effect

International Journal of Heat and Mass Transfer ◽

10.1016/0017-9310(68)90018-5 ◽

1968 ◽

Vol 11 (12) ◽

pp. 1753-1760 ◽

Cited By ~ 16

Author(s):

E. Ruckenstein

Keyword(s):

Mass Transfer ◽

Marangoni Effect

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A New Computational Method to Track a Liquid/Vapor Interface With Mass Transfer, Demonstrated on the Concentration Driven Evaporation From a Capillary Tube, and the Marangoni Effect

Heat Transfer, Part B ◽

10.1115/imece2005-81433 ◽

2005 ◽

Cited By ~ 4

Author(s):

Jeremy Rice ◽

Amir Faghri

Keyword(s):

Mass Transfer ◽

Marangoni Convection ◽

Capillary Tube ◽

Marangoni Effect ◽

Solution Procedure ◽

Computational Method ◽

Interface Tracking ◽

Vapor Interface ◽

Tracking Technique ◽

Liquid Vapor

A new computational liquid/vapor interface tracking technique is developed to model an interface between a liquid and a vapor including mass transfer. This technique does not require the use of an additional transport equation, as does the VOF method, while still being implemented without a complicated solution procedure. This new interface tracking technique is used to capture the liquid/vapor interface in a capillary tube of 100 μm scale. The diffusion driven evaporation process is studied, along with the Marangoni convection that is caused by the temperature gradient along the interface. The results are qualitatively and quantitatively compared to existing experimental data.

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On the evaluation of the interfacial turbulence (the Marangoni effect) in gas (vapour)—liquid mass transfer

Chemical Engineering and Processing - Process Intensification ◽

10.1016/0255-2701(91)87016-v ◽

1991 ◽

Vol 29 (2) ◽

pp. 77-82 ◽

Cited By ~ 14

Author(s):

K.R. Semkov ◽

N. Kolev

Keyword(s):

Mass Transfer ◽

Marangoni Effect ◽

Liquid Mass ◽

Liquid Mass Transfer

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Mass transfer, marangoni effect, and instability of interfacial longitudinal waves

Journal of Colloid and Interface Science ◽

10.1016/0021-9797(79)90087-0 ◽

1979 ◽

Vol 69 (1) ◽

pp. 128-137 ◽

Cited By ~ 48

Author(s):

M Hennenberg ◽

P.M Bisch ◽

M Vignes-Adler ◽

A Sanfeld

Keyword(s):

Mass Transfer ◽

Marangoni Effect ◽

Longitudinal Waves

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Linear Stability Analysis of Marangoni Effect on Desorption Liquid Layer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.479-481.1380 ◽

2012 ◽

Vol 479-481 ◽

pp. 1380-1386

Author(s):

Jie Chen ◽

Ai Wu Zeng ◽

Li Ming Yu

Keyword(s):

Mass Transfer ◽

Linear Stability ◽

Liquid Layer ◽

Schmidt Number ◽

Marangoni Convection ◽

Critical Time ◽

Marangoni Effect ◽

Mass Transfer Process ◽

Linear Stability Theory ◽

Main Factor

Stability of static liquid layer in mass transfer process accompanied by concentration-driven Marangoni effect was modeled and analyzed by utilizing the linear stability theory. The critical condition of the onset of the Marangoni convection was obtained. It is found that the liquid layer becomes more unstable with the increase of the Schmidt number, and it becomes the most volatile when the Biot number is about 0.85. The critical time to mark the onset of Marangoni convection can be predicted with the established model. The research results show that the concentration gradient is the main factor to initiate the Marangoni convection.

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