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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Imprimir: 1940-2503
ISSN En Línea: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2011003229
pages 333-342

HEAT AND MASS TRANSFER CONTROL BY EVAPORATIVE THERMAL PATTERNING OF THIN LIQUID LAYERS

Carlo Saverio Iorio
Service de Chimie-Physique EP, CP165-62, Université Libre de Bruxelles, 50 Av. F.D. Roosevelt 1050, Brussels, Belgium
Olga N. Goncharova
Department of Differential Equations, Altai State University, Barnaul; Institute of Thermophysics, Russian Academy of Sciences, Novosibirsk, Russian Federation; and Heat Transfer International Research Institute, Universite Libre de Bruxelles
Oleg A. Kabov
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, 1, Acad. Lavrentyev Ave., Novosibirsk, 630090, Russia; Institute of Power Engineering, National Tomsk Polytechnic Research University, 7, Usova Street, Tomsk, 634050, Russia; Novosibirsk State University, 2, Pirogova str., Novosibirsk, 630090, Russia

SINOPSIS

For several years, interfacial instabilities arising in evaporating layers of volatile liquid when subjected to a shear flow of inert and non-absorptive gas have been studied for their intrinsic complexity due to the interaction between different phenomena such as heat and mass transfer through the layer interface, thermo-capillarity, natural convection, and shear-induced stresses. More recently, the possibility of generating ordered thermal patterns in an evaporating layer by controlling such kinds of instabilities has been considered as an intriguing technique to enhance heat and mass transfer in precisely defined spots at the interface of the layers. We studied numerically the topology of the thermal patterns as well as the heat and mass transfer characteristics that can be induced in an evaporating liquid layer by controlling the thickness of the layer while keeping constant the gas flow intensity. Calculations have been conducted by considering ethanol as the working fluid and nitrogen as the inert gas. The thickness of the layer was varied in order to have aspect ratios with respect to the characteristic length of the evaporating interface in the range of 0.02−1. The inspiring reason for performing the simulations reported in this paper is the preparation of the CIMEX-1 experiment that will be performed on-board the International Space Station in the next future. For that reason, all the calculations presented refer to the condition of the absence of gravity.


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