Issue 25, 2020
From the journal:

Soft Matter

Impurity effects in thermal regelation

Navaneeth K. Maratha  and  J. S. Wettlaufer ORCID logo *ab  

* Corresponding authors

a Nordic Institute for Theoretical Physics, Stockholm, Sweden
E-mail: ljohn.wettlaufer@su.se

b Yale University, New Haven, Connecticut, USA

Abstract

When a particle is placed in a material with a lower bulk melting temperature, intermolecular forces can lead to the existence of a “premelted” liquid film of the lower melting temperature material. Despite the system being below the melting temperatures of both solids, the liquid film is a consequence of thermodynamic equilibrium, controlled by intermolecular, ionic and other interactions. An imposed temperature gradient drives the translation of the particle by a process of melting and refreezing known as “thermal regelation”. We calculate the rate of regelation of spherical particles surrounded by premelted films that contain ionic impurities. The impurities enhance the rate of motion thereby influencing the dynamics of single particles and distributions of particles, which we describe in addition to the consequences in natural and technological settings.

Graphical abstract: Impurity effects in thermal regelation

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Article information

DOI
https://doi.org/10.1039/D0SM00558D
Article type
Paper
Submitted
30 Mar 2020
Accepted
17 May 2020
First published
21 May 2020
This article is Open Access
Creative Commons BY-NC license

Soft Matter, 2020,16, 5886-5891

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Impurity effects in thermal regelation

N. K. Marath and J. S. Wettlaufer, Soft Matter, 2020, 16, 5886 DOI: 10.1039/D0SM00558D

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