Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 51, Issue 17-18, Pages 4228-4237Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2008.02.006
Keywords
free convection; evaporation; polymer solution; convective patterns
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Funding
- Agence Nationale de la Recherche, France [ANR-05-P-BLAN-0056-01]
- Ministere de l'Enseignement superieur et de la Recherche, France
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Within the framework of convection induced by evaporation, an experimental study of the drying of a polymer solution has been performed. several visualisations of convective pattern development are presented: top view with a video camera and all IR camera. as well as visualisation in a vertical section. The appearance and origin (buoyancy- and/or surface tension-driven instabilities) of the convective structures are analysed as a function of the initial thickness and viscosity. Different regimes are obtained when comparing the lifetime of the convective patterns to the thermal transient regime induced by evaporation and to the formation of a thin viscous skin at the surface. (c) 2008 Elsevier Ltd. All rights reserved.
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