Study of water droplet impinging on surface

• Main Author: Tan, Eugene Zhen Ning
• Other Authors: Huang Xiaoyang
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2019
• Subjects: DRNTU::Engineering::Mechanical engineering::Fluid mechanics
• Online Access: http://hdl.handle.net/10356/78632
• Institution: Nanyang Technological University

This report is an investigation of the impact and maximum spreading diameter of water droplets on surfaces with mesh and oil-infused surfaces. The drop and spreading of water droplets were captured using a Phantom V711 digital high-speed camera. The camera being able to capture as high as a million frames per second, allowed researchers to record the characteristics of the droplets progression as it impacted the surface. In this study of the impingement of water droplets, the surfaces which the water droplets would be tested on would be modified. The results would then be collected, processed and analyzed. Results showed that mesh surfaces exhibited signs of being hydrophobic, with finger/flower-like patterns when receding and spreading diameters differed with different mesh sizes. Oil-infused surface of varying viscosities was compared alongside smooth copper surface and results implied that oil-infused surfaces with higher viscosities acted more similar to normal smooth surfaces while oil-infused surfaces with lower viscosities acted as superhydrophobic surfaces.