Ultra-Highspeed Optical Diagnostics of Water Droplet Impact, Breakup and Shock Boundary Layer Interactions of Hypervelocity Projectiles

2022 ◽  
Author(s):  
Gavin Lukasik ◽  
Jacob Rogers ◽  
Kalyan R. Kota ◽  
Rodney D. Bowersox ◽  
Thomas E. Lacy ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Water Droplet ◽  
Optical Diagnostics ◽  
Droplet Impact

Depth Profiling of Polystyrene Using Charged Water Droplet Impact

2009 ◽  
Vol 15 (3) ◽  
pp. 283-286 ◽  
Author(s):  
Yuji Sakai ◽  
Yoshitoki Iijima ◽  
Riou Takaishi ◽  
Daiki Asakawa ◽  
Kenzo Hiraoka
Keyword(s):  
Water Droplet ◽  
Depth Profiling ◽  
Droplet Impact ◽  
Charged Water

scholarly journals Pinned Droplet Size on a Superhydrophobic Surface in Shear Flow

Aerospace ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 34
Author(s):  
Mitsugu Hasegawa ◽  
Katsuaki Morita ◽  
Hirotaka Sakaue ◽  
Shigeo Kimura
Keyword(s):  
Boundary Layer ◽  
Shear Flow ◽  
Droplet Size ◽  
Water Droplet ◽  
Superhydrophobic Surface ◽  
High Speed ◽  
High Speed Camera ◽  
Sessile Droplet ◽  
Air Velocity

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.

scholarly journals Numerical simulation of water droplet impact test on aircraft wing structure

2019 ◽  
Vol 1276 ◽  
pp. 012034 ◽  
Author(s):  
S. Manigandan ◽  
Dineshkumar ◽  
Muthiaya Ramanathan ◽  
P. Gunasekar ◽  
J. Devipriya ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Water Droplet ◽  
Impact Test ◽  
Droplet Impact ◽  
Aircraft Wing ◽  
Wing Structure
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