Thin-Film-Mediated Deformation of Droplet during Cryopreservation

Jochem G. Meijer, Pallav Kant, Duco van Buuren, Detlef Lohse

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
50 Downloads (Pure)

Abstract

Freezing of dispersions is omnipresent in science and technology. While the passing of a freezing front over a solid particle is reasonably understood, this is not so for soft particles. Here, using an oil-in-water emulsion as a model system, we show that when engulfed into a growing ice front, a soft particle severely deforms. This deformation strongly depends on the engulfment velocity V, even forming pointy-tip shapes for low values of V. We find such singular deformations are mediated by interfacial flows in nanometric thin liquid films separating the nonsolidifying dispersed droplets and the solidifying bulk. We model the fluid flow in these intervening thin films using a lubrication approximation and then relate it to the deformation sustained by the dispersed droplet.
Original languageEnglish
Article number214002
JournalPhysical review letters
Volume130
Issue number21
DOIs
Publication statusPublished - 25 May 2023

Keywords

  • 2023 OA procedure

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