Marangoni flows induced by atmospheric-pressure plasma jets

We studied the interaction of atmospheric-pressure plasma jets of Ar or air with liquid films of an aliphatic hydrocarbon on moving solid substrates. The hydrodynamic jet-liquid interaction induces a track of lower film thickness. The chemical plasma-surface interaction oxidizes the liquid, leading...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2015-01, Vol.48 (2), p.25203-11
Main Authors: Berendsen, C W J, van Veldhuizen, E M, Kroesen, G M W, Darhuber, A A
Format: Article
Language:English
Subjects:
atmospheric-pressure plasma jet
Coarsening
Computational fluid dynamics
Film thickness
Instability
Liquid films
Liquids
Marangoni flow
Mathematical models
Plasma jets
solutocapillary flow
thin liquid films
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Summary:We studied the interaction of atmospheric-pressure plasma jets of Ar or air with liquid films of an aliphatic hydrocarbon on moving solid substrates. The hydrodynamic jet-liquid interaction induces a track of lower film thickness. The chemical plasma-surface interaction oxidizes the liquid, leading to a local increase of the surface tension and a self-organized redistribution of the liquid film. We developed a numerical model that qualitatively reproduces the formation, instability and coarsening of the flow patterns observed in the experiments. Monitoring the liquid flow has potential as an in-situ, spatially and temporally resolved, diagnostic tool for the plasma-liquid surface interaction.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/48/2/025203