What is it about?

The dynamic contact line (DCL) motion still remains unclear mainly due to the lack of the nanoscale information. We show a unique thermal phenomenon around the DCL, cooling at the receding contact lines by using molecular dynamics simulations.

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Why is it important?

We have presented a heat transport analysis methodology applicable in multi-component MD systems, which we have used to investigate the heat transport features of the DCL. The heat analysis revealed that heat is not only produced but also absorbed around DCLs, mainly due to the quasi-latent heat induced by the internal energy change of fluid along the pathline, when the fluid moves among the interfaces, which is accompanied by a change in fluid–fluid and fluid–solid interaction energy.


I hope this article is of interest. The framework for the analysis of the heat transport at the molecular scale should be useful for investigating various nanoscale systems such as the flow in carbon nanotubes or in nanoporous media.

Hiroki Kusudo
Tohoku Daigaku

Read the Original

This page is a summary of: The receding contact line cools down during dynamic wetting, The Journal of Chemical Physics, October 2023, American Institute of Physics,
DOI: 10.1063/5.0171769.
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