Capillary Wave and Initial Spreading Velocity at Impact of Drop onto a Surface
Publish place: Journal of Applied Fluid Mechanics، Vol: 12، Issue: 4
Publish Year: 1398
Type: Journal paper
Language: English
View: 244
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Document National Code:
JR_JAFM-12-4_024
Index date: 5 January 2022
Capillary Wave and Initial Spreading Velocity at Impact of Drop onto a Surface abstract
The capillary wave and initial spreading velocity in the spreading phase of drop impacting on a glass surface are studied experimentally, while the drop photos are obtained by using a high-speed video camera, which can catch up to 9000 images per second with an exposure time of 4 µs. A wide range of impact velocities are studied by varying the fall height, showing different capillary waves. All attention is given to the capillary wave and initial spreading velocity of drop. A non-linear relation between the wavelength and the impact velocity is found experimentally. Combined with the minimum spreading radius theory, a linear relation between the initial spreading velocity and the impact velocity is acquired.
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Capillary Wave and Initial Spreading Velocity at Impact of Drop onto a Surface authors
P. F. Li
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing ۲۱۰۰۱۶, China
S. F. Wang
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing ۲۱۰۰۱۶, China
W. L. Dong
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing ۲۱۰۰۱۶, China