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Droplet migration on conical fibers

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Abstract

The spontaneous migration of droplets on conical fibers is studied experimentally by depositing silicone oil droplets onto conical glass fibers. Their motion is recorded using optical microscopy and analyzed to extract the relevant geometrical parameters of the system. The speed of the droplet can be predicted as a function of geometry and the fluid properties using a simple theoretical model, which balances viscous dissipation against the surface tension driving force. The experimental data are found to be in good agreement with the model.

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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: Please contact the corresponding author for data.]

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Acknowledgements

The authors are grateful to Michael Brook and Dan Chen for providing the silicone oils, and to Tak Shing Chan and Andreas Carlson for extensive discussions. The financial support by the Natural Science and Engineering Research Council of Canada is gratefully acknowledged.

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Authors and Affiliations

Authors

Contributions

CF, RDS and KDV designed the research project, CF performed all experiments, all authors contributed to analyzing the data and developing the models, and CF wrote the first draft of the manuscript. All authors edited the manuscript to generate a final version and contributed to discussions.

Corresponding author

Correspondence to Kari Dalnoki-Veress.

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Fournier, C., Lee, C.L., Schulman, R.D. et al. Droplet migration on conical fibers. Eur. Phys. J. E 44, 12 (2021). https://doi.org/10.1140/epje/s10189-021-00014-z

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  • DOI: https://doi.org/10.1140/epje/s10189-021-00014-z

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