Large‐scale SPH simulations of droplet impact onto a liquid surface up to the consequent formation of Worthington jet |
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Authors: | Naoto Nishio Kentaro Yamana Yasutaka Yamaguchi Takehiko Inaba Koji Kuroda Tadashi Nakajima Kouhei Ohno Hideo Fujimura |
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Affiliation: | 1. Department of Mechanical Engineering, Osaka University, 2‐1 Yamadaoka, Suita, Osaka 565‐0871, Japan;2. Nano Science Research Center, Dai Nippon Printing Co., Ltd., Japan |
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Abstract: | In this study, the whole process of liquid droplet impact onto a liquid surface up to the consequent formation of the central column was simulated using the smoothed particle hydrodynamics method (SPH), and compared with an experiment using a high‐speed video camera. The surface tension tensor for the particle‐based expression was adequately included as the gradient of the surface tension and that enabled the simulation leading to the formations of crater and crown as well as the consequent central column. The simulated time series of the crater depth and diameter and crown height corresponded quantitatively well with the experimental result up to the rebound motion while discrepancies remained as a lower central column height in the simulation, and this seemed to be ascribed to the difficulty in realizing the complex surface structure that inevitably appeared in the fast rebound motion. Copyright © 2009 John Wiley & Sons, Ltd. |
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Keywords: | smoothed particle hydrodynamics droplet impact splash surface tension |
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