Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Inspired by the water-repellent and self-cleaning properties of the lotus leaf found in nature, artificial superhydrophobic surfaces have garnered extensive attention across academia and industry. Dynamic hydrophobicity is an important phenomenon in both everyday life and various industrial processes. However, only a few studies have explored the dynamic characteristics of droplets on hydrophobic surfaces. This study measures the frictional forces of water droplets to investigate their sliding behaviors on a hydrophobic surface. It is observed that the frictional force is linearly related to the effective shear displacement. The dynamic frictional forces are also measured as the sliding speed increases. Results are analyzed based on molecular kinetic theory, with calculated and compared average molecular displacement distances and frequencies of adsorption-desorption events around the contact line.
