Physics

Direct visualization of viscous dissipation and wetting ridge geometry on lubricant-infused surfaces

A. Naga, M. Rennick, et al.

This groundbreaking research by Abhinav Naga, Michael Rennick, Lukas Hauer, William S. Y. Wong, Azadeh Sharifi-Aghili, Doris Vollmer, and Halim Kusumaatmaja unveils the unique dynamics of drops on lubricant-infused surfaces, revealing how wetting ridge height alters with speed. Discover insights on energy dissipation and the minimal impact of surface geometry.

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Playback language: English

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Abstract

Drops are exceptionally mobile on lubricant-infused surfaces (LIS), exhibiting different dynamics than on superhydrophobic surfaces due to wetting ridge formation. This study uses lattice Boltzmann simulations and confocal microscopy to image wetting ridge evolution with speed and visualize energy dissipation on flat and rough LIS. Results show wetting ridge height decreases with speed according to a power law, developing asymmetry. Most dissipation occurs in front and behind the drop, with surface geometry minimally affecting the mechanism. Future designs should focus on maximizing lubricant retention.

Publisher

Communications Physics

Published On

Sep 17, 2024

Authors

Abhinav Naga, Michael Rennick, Lukas Hauer, William S. Y. Wong, Azadeh Sharifi-Aghili, Doris Vollmer, Halim Kusumaatmaja

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