Numerical prediction of the film thickening due to surfactantsin the Landau-Levich problem

In this work numerical solutions of the dip coating problem in the presence of a soluble surfactant are shown. Predictions of film thickening as well as thickening factors are in very good agreement with published experimental data, showing that pure hydrodynamic modeling suffices to mimic the proce...

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Bibliographic Details
Published inPhysics of fluids (1994) Vol. 22; no. 3; pp. 032103 - 032103-9
Main Authors Campana, Diego M., Ubal, Sebastián, Giavedoni, María D., Saita, Fernando A.
Format Journal Article
Published American Institute of Physics 18.03.2010
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Summary:In this work numerical solutions of the dip coating problem in the presence of a soluble surfactant are shown. Predictions of film thickening as well as thickening factors are in very good agreement with published experimental data, showing that pure hydrodynamic modeling suffices to mimic the process. Our numerical solutions provide a wealth of information on the functioning of the dip coating system; they show the appearance of a second stagnation point located in the bulk phase near the dynamic meniscus and they give clues about how the flow patterns might change as the surfactant becomes less soluble.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.3341019