Volume 110, Number 5, June 2015
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||24 June 2015|
Frost formation with salt
1 Department of Physics and Applied Mathematics, University of Navarra - Pamplona, Spain
2 Physique et Mécanique des Milieux Hétérogènes, UMR 7636 CNRS - ESPCI - Université Pierre et Marie Curie - Université Paris Diderot - 10 rue Vauquelin, 75005 Paris, France
3 Service des Basses Températures, CEA-Grenoble & Université Joseph Fourier - Grenoble, France
4 OPUR - 60 rue Emeriau, 75015 Paris, France
Received: 27 March 2015
Accepted: 1 June 2015
The formation of frost in presence of salt (NaCl) crystal is experimentally investigated on a hydrophobic surface. It presents several remarkable features due to the interplay of salty-water saturation pressure evolution, initially lower than the saturation pressure of ice and water, and the percolating propagation of ice dendrites from defects throughout the supercooled water droplet pattern. In particular, it is remarkable that nucleation of supercooled water and/or ice is prevented around the salty drop in a region of inhibited condensation where the substrate remains dry. As condensation proceeds, salt concentration decreases to eventually become lower than ice's, allowing ice dendrites to hit the salty drop. Salty water then melts ice but eventually freezes as an effect of dilution.
PACS: 68.03.Fg – Evaporation and condensation of liquids / 68.18.Jk – Phase transitions in liquid thin films / 64.70.-p – Specific phase transitions
© EPLA, 2015
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