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Modelling of droplet impacts on dry and wet surfaces using depth-averaged form

Hook, K.S.L.; Veremieiev, S.

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Authors

K.S.L. Hook



Abstract

An efficient time-adaptive multigrid algorithm is used to solve a range of normal and oblique droplet impacts on dry surfaces and liquid films using the Depth-Averaged Form (DAF) method of the governing unsteady Navier–Stokes equations. The dynamics of a moving three-phase contact line on dry surfaces is predicted by a precursor film model. The method is validated against a variety of experimental results for droplet impacts, looking at factors such as crown height and diameter, spreading diameter and splashing for a range of Weber, Reynolds and Froude numbers along with liquid film thicknesses and impact angles. It is found that, while being a computationally inexpensive methodology, the DAF method produces accurate predictions of the crown and spreading diameters as well as conditions for splash, however, underpredicts the crown height as the vertical inertia is not included in the model.

Citation

Hook, K., & Veremieiev, S. (2021). Modelling of droplet impacts on dry and wet surfaces using depth-averaged form. Journal of Engineering Mathematics, 126(1), Article 14. https://doi.org/10.1007/s10665-020-10081-4

Journal Article Type Article
Acceptance Date Dec 5, 2020
Online Publication Date Feb 15, 2021
Publication Date 2021
Deposit Date Feb 18, 2021
Publicly Available Date Apr 15, 2021
Journal Journal of Engineering Mathematics
Print ISSN 0022-0833
Electronic ISSN 1573-2703
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 126
Issue 1
Article Number 14
DOI https://doi.org/10.1007/s10665-020-10081-4
Public URL https://durham-repository.worktribe.com/output/1280203

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