Freezing a rivulet

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• Axel Huerre, Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris
• Friday 11 June 2021, 16:30-17:00
• GKB100 Fluid Mechanics Webinar Series via Zoom.

If you have a question about this talk, please contact Dr C. P. Caulfield.

We investigate experimentally the formation of the particular ice structure obtained when a capillary trickle of water flows on a cold substrate. 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 quantitatively the formation dynamics and the final thickness of this ice structure. In particular, we identify two growth regimes. First, a 1D solidification diffusive regime, where ice is building independently of the flowing 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 explained by considering the competition between the water cooling and its convection.

This talk is part of the Fluid Mechanics (DAMTP) series.

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