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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

STUDY OF THE FACTORS AFFECTING THETEMPERATURE FIELD DISTRIBUTION DURING DROPLET EVAPORATION

Get access (open in a dialog) DOI: 10.1615/IHTC16.bae.022247
pages 1077-1084

Abstract

In the natural world and industrial production, sessile droplet evaporation is a common phenomenon. It is well known that droplet evaporation will absorbs heat from the surrounding environment and play a role in cooling, so we have a comprehensive study on the temperature field distribution during the process of droplet evaporation. Our topic will research on the droplet evaporation from experimental and theoretical aspects. The research measured volume of Al2O3-H2O nanofluid sessile droplet with three different concentrations, three different sizes in nanoparticle on a glass under five heating temperatures. The pure liquid(alcohol) will be dropped on copper. The heated substrates' temperature were 30°C, 35°C, 40°C, 45°C and 50°C, respectively. We measured the contact angle, contact diameter, evaporation rate and analyze droplet surface's temperature field. The results showed that the nanofluid evaporation results in a non-uniform temperature profile along the free interface, the temperature of center is the lowest and the temperature of edge is the highest. When the droplet was alcohol and the substrate is copper, the cooling effect of droplet will happen obviously.