Adhesive forces in droplet kinetic friction
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arXiv
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| Hauptverfasser: | , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866911203524083712 |
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| author | McHale, Glen Janahi, Sara Barrio-Zhang, Hernán Wang, Yaofeng Chen, Jinju Wells, Gary G. Ledesma-Aguilar, Rodrigo |
| author_facet | McHale, Glen Janahi, Sara Barrio-Zhang, Hernán Wang, Yaofeng Chen, Jinju Wells, Gary G. Ledesma-Aguilar, Rodrigo |
| contents | Kinetic frictional forces resisting droplet motion often appear to be separate to surface wettability and adhesive forces. Here we show that such friction arises from a simple combination of the contact angle hysteresis and adhesive force. We show theoretically, and confirm using tilt angle experiments of droplets on liquid-like surfaces, the dependence of the coefficient of droplet-on-solid kinetic friction on system parameters. We also show that a molecular kinetic-type model can describe the observed non-linear velocity-force relationship. Our findings provide a fundamental understanding of the relationship between droplet-on-solid friction, and wettability and liquid adhesion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_09642 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Adhesive forces in droplet kinetic friction McHale, Glen Janahi, Sara Barrio-Zhang, Hernán Wang, Yaofeng Chen, Jinju Wells, Gary G. Ledesma-Aguilar, Rodrigo Fluid Dynamics Materials Science Soft Condensed Matter Kinetic frictional forces resisting droplet motion often appear to be separate to surface wettability and adhesive forces. Here we show that such friction arises from a simple combination of the contact angle hysteresis and adhesive force. We show theoretically, and confirm using tilt angle experiments of droplets on liquid-like surfaces, the dependence of the coefficient of droplet-on-solid kinetic friction on system parameters. We also show that a molecular kinetic-type model can describe the observed non-linear velocity-force relationship. Our findings provide a fundamental understanding of the relationship between droplet-on-solid friction, and wettability and liquid adhesion. |
| title | Adhesive forces in droplet kinetic friction |
| topic | Fluid Dynamics Materials Science Soft Condensed Matter |
| url | https://arxiv.org/abs/2510.09642 |