Movement characteristics of the inclined surface flow of the open channel on the nanoscale surface

Yen-Chang Chen; Han-Chung Yang

doi:10.1016/j.heliyon.2023.e17677

Movement characteristics of the inclined surface flow of the open channel on the nanoscale surface

Heliyon. 2023 Jun 26;9(7):e17677. doi: 10.1016/j.heliyon.2023.e17677. eCollection 2023 Jul.

Authors

Yen-Chang Chen¹, Han-Chung Yang²

Affiliations

¹ Department of Civil Engineering, National Taipei University of Technology, Taipei, Taiwan, ROC.
² Department of Marine Leisure Management, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan, ROC.

Abstract

This study investigates the water flow characteristics on a solid surface with nanoscale compared to a normal solid surface. The experiment uses a high-speed video system and Fiber-optic Laser Doppler Velocimetry to measure the flow condition of the droplet and velocity distribution profile in the inclined surface flow of the open channel, respectively. The results showed that the movement speed of water droplets on the nanoscale surface was about 2 times faster than on the normal surface. The mean error of each velocity profile was 0.6%. The results reveal that the velocity profile is not significantly influenced by whether the flume bottom is coated with nanoscale material or not in the inclined surface flow of the open channel.

Keywords: Fiber-optic laser doppler velocimetry; High-speed video system; Nanoscale; Open channel; Velocity profile.