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SUMMARY:Freezing a rivulet - Axel Huerre\, Laboratoire Matière et Systèm
 es Complexes (MSC)\, Université de Paris
DTSTART:20210611T153000Z
DTEND:20210611T160000Z
UID:TALK161020@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:We investigate experimentally the formation of the particular 
 ice structure obtained when a capillary trickle of water flows on a cold s
 ubstrate. We show that after a few minutes the water ends up flow-ing on a
  tiny ice wall whose shape is permanent. We characterize and understand qu
 antitatively the formation dynamics and the final thickness of this ice st
 ructure. In particular\, we identify two growth regimes. First\, a 1D soli
 dification diffusive regime\, where ice is building independently of the f
 lowing water. And second\, once the ice is thick enough\, the heat flux in
  the water comes into play\, breaking the 1D symmetry of the problem\, and
  the ice ends up thickening linearly downward. This linear pattern is expl
 ained by considering the competition between the water cooling and its con
 vection.
LOCATION:GKB100  Fluid Mechanics Webinar Series via Zoom
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