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Water entry of stripe-coated hydrophobic circular cylinders

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Abstract

This paper visually demonstrates water entry of horizontal hydrophobic circular cylinders, 12 mm in diameter and 300 mm long, by three types of coating of a water-repellent material; (a) perfectly coated, (b) right half surface coated, and (c) stripe coated. After the entry of the cylinder into water, the hydrophobic surface of the cylinder forms an air cavity behind it, whereas the hydrophilic surface is perfectly wetted. As a result, the resulting cavities are found to independently grow and break off from the cylinder even for the Type (c).

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Acknowledgments

The present authors would express their sincere thanks to Photron Ltd., for providing the high-speed camera of FASTCAM SA5 model.

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Hokkaido University, Hokkaido, 060–8628, Japan

    Y. Ueda & M. Iguchi

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  1. Y. Ueda
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  2. M. Iguchi
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Correspondence to Y. Ueda.

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Ueda, Y., Iguchi, M. Water entry of stripe-coated hydrophobic circular cylinders. J Vis 15, 33–35 (2012). https://doi.org/10.1007/s12650-011-0106-x

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  • DOI: https://doi.org/10.1007/s12650-011-0106-x

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