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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

CONVECTIVE FLOWS INSIDE AND OUTSIDE AN EVAPORATING SESSILE DROP

Get access (open in a dialog) DOI: 10.1615/IHTC16.bae.022585
pages 731-738

Résumé

A comprehensive numerical model is developed to study the quasi-steady convective transport inside and outside an evaporating water sessile drop and its interaction with the solid substrate. The model includes the effects of the strong evaporation near the pinned contact line, thermo-capillarity, thermal buoyancy in the liquid phase and thermo-solutal buoyancy in the surrounding air. Numerical results allow analyzing the different effects. For instance, the thermo-capillary effect and the thermo-solutal convection in the gas phase may induce significant increase of heat and mass transfer at the drop edge, while thermo-capillary effect in the liquid phase on the evaporation rate is of less importance. Furthermore, the thermal energy supplied from the substrate has a substantial effect on the evaporative cooling, and the wall temperature and the thermal conductivity of the solid substrate strongly affect the evaporation kinetics.