Impurity effects in thermal regelation

by Dr Navaneeth Marath (NORDITA)

Tuesday 14 Apr 2020, 13:30 → 15:30 Europe/Stockholm

Fysikum equipment

THIS SEMINAR WAS ORGANIZED BY NORDITA SOFT MATTER

The zoom link : 

https://stockholmuniversity.zoom.us/j/61540388020

Meeting ID: 615 4038 8020

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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.  An imposed temperature gradient drive the translation of the
particle by a process of melting and refreezing known as “thermal
regelation”. In this talk, I will discuss the calculation of the rate of
regelation of spherical particles surrounded by premelted films that
contain ionic impurities. I will show that the impurities enhance the rate
of regelation and discuss its influence on the dynamics of single particles
and distributions of particles, Finally, I will talk about the consequences
of thermal regelation in the context of dating of ice cores.