Next Article in Journal
In Situ Measurement of Carbon Fibre/Polyether Ether Ketone Thermal Expansion in Low Earth Orbit
Next Article in Special Issue
Fast Evaluation of Aircraft Icing Severity Using Machine Learning Based on XGBoost
Previous Article in Journal
S-Parameter-Based Defect Localization for Ultrasonic Guided Wave SHM
Open AccessArticle

Pinned Droplet Size on a Superhydrophobic Surface in Shear Flow

1
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
2
Frontier Technology Development Unit, Research and Development Div., Nippon Paint Surf Chemicals Co., LTD, Shinagawa, Tokyo 140-8675, Japan
3
Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi, Kanagawa 243-0292, Japan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Aerospace 2020, 7(3), 34; https://doi.org/10.3390/aerospace7030034
Received: 1 February 2020 / Revised: 17 March 2020 / Accepted: 18 March 2020 / Published: 21 March 2020
(This article belongs to the Special Issue Deicing and Anti-Icing of Aircraft)
The recent development of a superhydrophobic surface enhances the droplet shedding under a shear flow. The present study gives insights into the effects of shear flow on a pinned droplet over a superhydrophobic surface. To experimentally simulate the change in the size of a sessile droplet on an aerodynamic surface, the volume of the pinned droplet is expanded by water supplied through a pore. Under a continuous airflow that provides a shear flow over the superhydrophobic surface, the size of a pinned water droplet shed from the surface is experimentally characterized. The air velocity ranges from 8 to 61 m/s, and the size of pinned droplets shed at a given air velocity is measured using an instantaneous snapshot captured with a high-speed camera. It is found that the size of the shedding pinned droplet decreases as air velocity increases. At higher air velocities, shedding pinned droplets are fully immersed in the boundary layer. The present findings give a correlation between critical air velocity and the size of pinned droplets shed from the pore over the superhydrophobic surface. View Full-Text
Keywords: droplet shedding; shear flow; superhydrophobic surface droplet shedding; shear flow; superhydrophobic surface
Show Figures

Graphical abstract

MDPI and ACS Style

Hasegawa, M.; Morita, K.; Sakaue, H.; Kimura, S. Pinned Droplet Size on a Superhydrophobic Surface in Shear Flow. Aerospace 2020, 7, 34.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop