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  Fast-freezing kinetics inside a droplet impacting on a cold surface

Kant, P., Koldeweij, R. B. J., Harth, K., van Limbeek, M. A. J., & Lohse, D. (2020). Fast-freezing kinetics inside a droplet impacting on a cold surface. Proceedings of the National Academy of Sciences of the United States of America, 117(6), 2788-2794. doi:10.1073/pnas.1912406117.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9255-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-F1B3-0
Genre: Journal Article

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 Creators:
Kant, P., Author
Koldeweij, R. B. J., Author
Harth, K., Author
van Limbeek, Michiel A. J.1, Author              
Lohse, Detlef2, Author              
Affiliations:
1Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063299              
2Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063285              

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Free keywords: classical nucleation theory; crystal growth; droplet impact; phase change; solidification
 Abstract: Freezing or solidification of impacting droplets is omnipresent in nature and technology, be it a rain droplet falling on a supercooled surface; in inkjet printing, where often molten wax is used; in additive manufacturing or metal-production processes; or in extreme ultraviolet lithography (EUV) for the chip production, where molten tin is used to generate the EUV radiation. For many of these industrial applications, a detailed understanding of the solidification process is essential. Here, by adopting an optical technique in the context of freezing-namely, total-internal reflection (TIR)-we elucidate the freezing kinetics during the solidification of a droplet while it impacts on an undercooled surface. We show that at sufficiently high undercooling, a peculiar freezing morphology exists that involves sequential advection of frozen fronts from the center of the droplet to its boundaries. This phenomenon is examined by combining elements of classical nucleation theory to the large-scale hydrodynamics on the droplet scale, bringing together two subfields which traditionally have been quite separated. Furthermore, we report a self-peeling phenomenon of a frozen splat that is driven by the existence of a transient crystalline state during solidification.

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Language(s): eng - English
 Dates: 2020-01-242020-02-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1073/pnas.1912406117
 Degree: -

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Title: Proceedings of the National Academy of Sciences of the United States of America
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 117 (6) Sequence Number: - Start / End Page: 2788 - 2794 Identifier: -