Faraday instability in a surface-frozen liquid |
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Authors: | Huber P Soprunyuk V P Embs J P Wagner C Deutsch M Kumar S |
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Affiliation: | Technische Physik, Universit?t des Saarlandes, 66041 Saarbrücken, Germany. p.huber@physik.uni-saarland.de |
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Abstract: | Faraday surface instability measurements of the critical acceleration, a(c), and wave number, k(c), for standing surface waves on a tetracosanol (C24H50) melt exhibit abrupt changes at T(s)=54 degrees C, approximately 4 degrees C above the bulk freezing temperature. The measured variations of a(c) and k(c) vs temperature and driving frequency are accounted for quantitatively by a hydrodynamic model, revealing a change from a free-slip surface flow, generic for a free liquid surface (T>T(s)), to a surface-pinned, no-slip flow, characteristic of a flow near a wetted solid wall (T
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