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Citation:
　Xujian Lyu,Honglu Yun,Zhaoyu Wei.Experimental Study of a Sphere Bouncing on the Water[J].Journal of Marine Science and Application,2021,(4):714-722.[doi:10.1007/s11804-021-00236-9]
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Experimental Study of a Sphere Bouncing on the Water

Info

Title:
Experimental Study of a Sphere Bouncing on the Water
Author(s):
Xujian Lyu1;  Honglu Yun1; 2;  Zhaoyu Wei2
Affilations:
Author(s):
Xujian Lyu1;  Honglu Yun1; 2;  Zhaoyu Wei2
1. School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China;
2. School of Oceanography, Shanghai Jiao Tong University, Shanghai, 200240, China
Keywords:
Water entry|Bouncing sphere|Critical impact angle|High-speed photograph|Splash
分类号:
-
DOI:
10.1007/s11804-021-00236-9
Abstract:
In this paper, the flow physics and impact dynamics of a sphere bouncing on a water surface are studied experimentally. During the experiments, high-speed camera photography techniques are used to capture the cavity and free surface evolution when the sphere impacts and skips on the water surface. The influences of the impact velocity (v1) and impact angle (θ1) of the sphere on the bouncing flow physics are also investigated, including the cavitation evolution, motion characteristics, and bounding law. Regulations for the relationship between v1 and θ1 to judge whether the sphere can bounce on the water surface are presented and analyzed by summarizing a large amount of experimental data. In addition, the effect of θ1 on the energy loss of the sphere is also analyzed and discussed. The experiment results show that there is a fitted curve of v1 = 17.5θ1 ? 45.5 determining the relationship between the critical initial velocity and angle whether the sphere bounces on the water surface.

References:

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Memo

Memo:
Received date:2021-03-15;Accepted date:2021-08-06。
Foundation item:Supported by the Fundamental Research Funds for the Central Universities (30918012201) and the Fund of the State Key Laboratory (6142604190302).
Corresponding author:Zhaoyu Wei,E-mail:wzhyu@sjtu.edu.cn
Last Update: 2022-03-21