Publication: Faraday instability in a surface-frozen liquid
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Date
2005-04-08
Authors
Huber, Patrick
Soprunyuk, Viktor
Embs, Jan P.
Wagner, Christian
Deutsch, Moshe
Kumar, Satish
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Faraday surface instability measurements of the critical acceleration, ac, and wavenumber, kc, for standing surface waves on a tetracosanol (C₂4H₅0) melt exhibit abrupt changes at Ts=54degC above the bulk freezing temperature. The measured variations of ac and kc 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>Ts), to a surface-pinned, no-slip flow, characteristic of a flow near a wetted solid wall (T < Ts). The change at Ts is traced to the onset of surface freezing, where the steep velocity gradient in the surface-pinned flow significantly increases the viscous dissipation near the surface.
Description
Keywords
Physics - Fluid Dynamics, Physics - Fluid Dynamics
Citation
Physical Review Letters 94 (18): 184504 (2005-04-08)