Abstract
Abstract In this paper, the surface evaporation of a sessile water droplet on hydrophobic solid substrates was numerically and experimentally investigated. The droplet evaporation is governed by multi-dimensional heat and mass transport and interfacial processes of three (gas, liquid, and solid) phases. A Computational Fluid Dynamics (CFD) simulation was performed to analyze the simultaneous heat and mass transfer in the surface evaporation of a sessile water droplet by considering the Marangoni and/or free convection. The results from the CFD simulation were validated using experimental results for the water droplet evaporation on a hydrophobic-coated silicon substrate. It was found that the droplet evaporation rate is greatly increased by a thermocapillary-driven flow (Marangoni convection) in the droplet with small liquid volumes of less than 2.4 μL on the hydrophobic substrate, while the contribution of the free convection is negligible. The peak mass flux of droplet evaporation was always observed along the three-phase contact line.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
