par Kamrak, Juthamas 
;Dehaeck, Sam ;Rednikov, Alexei ;Hsueh, Ching;Doumenc, Frédéric;Guerrier, Béatrice;Colinet, Pierre
Référence American Physical Society, 63rd Annual Meeting Division of Fluid Dynamics(21-23 November 2010: Long Beach, California, USA), Bulletin of the American Physical Society, Program of the 63rd Annual Meeting of the Division of Fluid Dynamics, the American Physical Society, USA, Vol. 55, Ed. 16, page (106)
Publication Publié, 2010-11
;Dehaeck, Sam ;Rednikov, Alexei ;Hsueh, Ching;Doumenc, Frédéric;Guerrier, Béatrice;Colinet, Pierre Référence American Physical Society, 63rd Annual Meeting Division of Fluid Dynamics(21-23 November 2010: Long Beach, California, USA), Bulletin of the American Physical Society, Program of the 63rd Annual Meeting of the Division of Fluid Dynamics, the American Physical Society, USA, Vol. 55, Ed. 16, page (106)
Publication Publié, 2010-11
Abstract de conférence
| Résumé : | Evaporation of binary mixtures is studied using a Hele-Shaw cell. Refractive index variations during the evaporation are followed using a Mach-Zehnder interferometer. A Rayleigh-Taylor instability, due to the evaporation-induced density stratification, is observed during the process, both for simple and more complex mixtures. A theoretical model is developed for 1D concentration profiles before instability, in order to facilitate the interpretation of the experimental results. In the case of the aqueous solutions of ethanol, it takes into account evaporation of both the solute and the solvent. However, in the case of polymer solutions, only the solvent evaporates, and the properties of the solution (viscosity, diffusion coefficient, saturated vapor pressure, etc.) strongly depend on the time-dependent polymer concentration. The concentration profiles obtained from the theoretical model are compared to the experiments, for both systems. |
