Affiliation of Author(s):能源与动力学院
Journal:JOURNAL OF APPLIED FLUID MECHANICS
Key Words:Drop impact Capillary wave initial spreading velocity Impact velocity Contact line
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 mu s. 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.
ISSN No.:1735-3572
Translation or Not:no
Date of Publication:2019-07-01
Co-author:Li, P. F.,Dong, W. L.
Correspondence Author:Suofang Wang