par Machrafi, Hatim;Dauby, Pierre;Sadoun, Nacer 
;Rednikov, Alexei ;Dehaeck, Sam ;Colinet, Pierre
Référence Microgravity, science and technology, 25, 4, page (251-265)
Publication Publié, 2013-12
;Rednikov, Alexei ;Dehaeck, Sam ;Colinet, Pierre Référence Microgravity, science and technology, 25, 4, page (251-265)
Publication Publié, 2013-12
Article révisé par les pairs
| Résumé : | In this work, we propose an approximate model of evaporation-induced Bénard-Marangoni instabilities in a volatile liquid layer with a free surface along which an inert gas flow is externally imposed. This setting corresponds to the configuration foreseen for the ESA-"EVAPORATION PATTERNS" space experiment, which involves HFE-7100 and nitrogen as working fluids. The approximate model consists in replacing the actual flowing gas layer by an "equivalent" gas at rest, with a thickness that is determined in order to yield comparable global evaporation rates. This allows studying the actual system in terms of an equivalent Pearson's problem (with a suitably defined wavenumber-dependent Biot number at the free surface), allowing to estimate how far above critical the system is for given control parameters. Among these, a parametric analysis is carried out as a function of the liquid-layer thickness, the flow rate of the gas, its relative humidity at the inlet, and the ambient pressure and temperature. © 2013 Springer Science+Business Media Dordrecht. |
