Effect of mass transfer on the film drainage between colliding drops

Journal of Colloid and Interface Science
J P ChevaillierC Gourdon

Abstract

The influence of mass transfer on the drainage behaviour of the thin liquid film between two drops immersed in another liquid colliding at constant approach velocity has been studied experimentally. The liquid-liquid system used is glycerol in silicone oil. The transferred solute is acetone and the volume concentration difference across the interface ranges from 1 to 5%. The film thickness evolution has been measured using a laser interferometry technique. The direction of mass transfer (from the drops towards the film phase and inversely) has been investigated and the results compared to the case with no mass transfer. When the solute transfers from the drops towards the continuous phase, the drainage rate is significantly higher than in the case with no mass transfer. This result is interpreted as a consequence of the mass transfer induced surface mobility in the film region (the so-called Marangoni effect) due to localized surface tension differences. This effect has been demonstrated by the visualization of the flow patterns in the drops and in the film phase (using a particle tracer technique). In this case, the slope of the film height as a function of time seems to be independent of the approach velocity condition impose...Continue Reading

References

Jul 1, 1997·Journal of Colloid and Interface Science·C DesnoyerC Gourdon
Aug 16, 2000·Journal of Colloid and Interface Science·E KlaseboerO Masbernat
Oct 6, 2000·Journal of Colloid and Interface Science·A K Chesters, I B Bazhlekov
Aug 15, 2001·Journal of Colloid and Interface Science·Leslie Y. YeoGeoffrey F. Hewitt
Mar 18, 2003·Faraday Discussions·Jason N Connor, Roger G Horn
Nov 1, 2005·Journal of Colloid and Interface Science·Leslie Y YeoGeoffrey F Hewitt

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Citations

Dec 25, 2009·Journal of Colloid and Interface Science·Deniz Z GunesAdam S Burbidge
Mar 4, 2008·Advances in Colloid and Interface Science·Albert Sanfeld, Annie Steinchen
Feb 12, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Vassili V YaminskyRoger G Horn

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