On metastable regimes of dynamic wetting

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Abstract

An explanation is proposed for a non-unique dependence of the dynamic contact angle on the wetting speed observed experimentally for some liquid-solid systems at low wetting speeds. The key idea is that the flow pattern near the wetting line, which follows from previously developed theory, suggests the possibility of a microscopic mass flux from the three-phase-interaction zone into the bulk thus causing 'imperfect rolling' of the spreading liquid. The resultant 'starvation' of the liquid-solid interface gives rise to a higher value of the contact angle. The above flow pattern turns into the regular one at a certain wetting speed thus determining the region where the metastable regimes of wetting, can be observed.
Original languageEnglish
Pages (from-to)319-330
Number of pages12
JournalJournal of Physics: Condensed Matter
Volume14
Issue number3
Early online date24 Dec 2001
DOIs
Publication statusPublished - 28 Jan 2002

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