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Main Title: Diffusion limited evaporation of a binary liquid film
Author(s): Chatwell, René Spencer
Heinen, Matthias
Vrabec, Jadran
Type: Article
Language Code: en
Abstract: An analytical solution of a model fluid’s time behavior, known as the Stefan problem, is presented. A scenario is investigated in which a planar two-component liquid film is continuously evaporating into a thermodynamically non-ideal vapor phase. Evaporation is initiated and maintained by a spatial chemical potential gradient, while its rate is limited by the components’ diffusion fluxes across the vapor-liquid interface. Local thermodynamic equilibrium is found to be present throughout the process. In contrast to the classical approach relying on equations of state, all required non-idealities are formulated in relation to the Gibbs energy and are determined by molecular simulations. Initially, the liquid is an equimolar mixture of two components of different volatility, whereas the adjacent vapor phase is dominated by a dense inert gas. To validate the analytical model and verify all exploited assumptions, the results are contrasted to large scale molecular dynamics simulations.
Issue Date: 21-Dec-2018
Date Available: 11-Apr-2019
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): evaporative mass transfer
analytical modeling
large scale molecular dynamics simulations
Journal Title: International Journal of Heat and Mass Transfer
Publisher: Elsevier
Publisher Place: Amsterdam [u.a.]
Volume: 132
Publisher DOI: 10.1016/j.ijheatmasstransfer.2018.12.030
Page Start: 1296
Page End: 1305
EISSN: 1879-2189
ISSN: 0017-9310
Appears in Collections:FG Thermodynamik und Thermische Verfahrenstechnik » Publications

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