Phase Separation of an Evaporating Ternary Solution in a Hele-Shaw Cell.

ABSTRACT: In the present work, we investigate the dynamic phenomena induced by solvent evaporation from ternary solutions confined in a Hele-Shaw cell. The model solutions consist of ethanol, water, and oil, and with the decrease in ethanol concentration by selective evaporation, they may undergo microdroplet formation via the ouzo effect or macroscopic liquid-liquid phase separation. We varied the initial concentration of the three components of the solutions. For all ternary solutions, evaporation of the good solvent ethanol from the gas-liquid interface, aligned with one side of the cell, leads to a Marangoni instability at the early stage of the evaporation process. The presence of the Marangoni instability is in agreement with our recent predictions based on linear stability analysis of binary

SUBMITTER: Lopez de la Cruz RA 

PROVIDER: S-EPMC8427745 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature