Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74954
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Title: Oblique impact of two successive droplets on a flat surface
Authors: Ahmad, S 
Tang, H 
Yao, H 
Issue Date: Apr-2018
Source: International journal of heat and mass transfer, Apr. 2018, v. 119, p. 433-445
Abstract: Using the lattice Boltzmann method, a numerical study was conducted to investigate the oblique impact of two successive droplets on a flat surface. The focus was placed on the effects of surface inclination, lateral/longitudinal offset, the impact dynamics of the two droplets and the subsequent dynamics of the combined droplet. The evolution of the topology, contact lines and spread factor of the two droplets under various conditions was compared and analyzed. It was found that, compared to single droplet impact, the impact of successive droplets shows quite different dynamics due to the involved coalescence process. The surface inclination causes asymmetric spreading of the droplets. The increase in surface inclination leads to faster downward spreading and reduced lateral spreading. The non-zero offset between the two droplets further enhances this asymmetry. Furthermore, the intermixing between the two droplets during the oblique impact was also examined. It was observed that the surface inclination changes the mass distribution of the combined droplet.
Keywords: Lateral/longitudinal offset
Lattice Boltzmann method
Oblique impact
Successive droplets
Publisher: Elsevier Ltd
Journal: International journal of heat and mass transfer 
ISSN: 0017-9310
EISSN: 1879-2189
DOI: 10.1016/j.ijheatmasstransfer.2017.11.129
Rights: © 2017 Elsevier Ltd. All rights reserved.
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
The following publication Ahmad, S., Tang, H., & Yao, H. (2018). Oblique impact of two successive droplets on a flat surface. International Journal of Heat and Mass Transfer, 119, 433-445 is available at https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.129
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