화학공학소재연구정보센터
International Journal of Heat and Mass Transfer, Vol.73, 810-818, 2014
Experimental investigation on variations in geometric variables of a droplet on a low-surface-energy solid
The changes in droplet geometry associated with volume change are experimentally investigated focusing on low surface energy solids. In particular, two experiments are performed to confirm the detailed droplet behavior such as the changes in height, radius, and contact angle, on a solid surface for a range of liquid surface energies. The first experiment involves the natural evaporation of droplets; droplet sizes from micrometer to millimeter are investigated. The second involves simply depositing droplets on a solid surface, then withdrawing liquid using a microsyringe. In this experiment, volume change is quantitatively evaluated. Our experimental results reveal details of the variations in droplet geometry among droplet radius, height, contact angle, and surface energy of the liquid. (C) 2014 Elsevier Ltd. All rights reserved.