From bouncing to floating: the Leidenfrost effect with hydrogel spheres

Waitukaitis SR, Harth K, Van Hecke M. 2018. From bouncing to floating: the Leidenfrost effect with hydrogel spheres. Physical Review Letters. 121(4), 048001.

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Journal Article | Published | English
Author
Waitukaitis, Scott RIST Austria ; Harth, Kirsten; Van Hecke, Martin
Abstract
The Leidenfrost effect occurs when a liquid or stiff sublimable solid near a hot surface creates enough vapor beneath it to lift itself up and float. In contrast, vaporizable soft solids, e.g., hydrogels, have been shown to exhibit persistent bouncing - the elastic Leidenfrost effect. By carefully lowering hydrogel spheres towards a hot surface, we discover that they are also capable of floating. The bounce-to-float transition is controlled by the approach velocity and temperature, analogously to the "dynamic Leidenfrost effect." For the floating regime, we measure power-law scalings for the gap geometry, which we explain with a model that couples the vaporization rate to the spherical shape. Our results reveal that hydrogels are a promising pathway for controlling floating Leidenfrost objects through shape.
Publishing Year
Date Published
2018-07-25
Journal Title
Physical Review Letters
Acknowledgement
We acknowledge funding from the Netherlands Organization for Scientific Research through Grants VICI No. NWO- 680-47-609 (M. v. H. and S. W.) and VENI No. NWO-680- 47-453 (S. W.), and from the German Science Foundation through Grant No. HA8467/1-1 (K. H.).
Volume
121
Issue
4
Article Number
048001
IST-REx-ID
126

Cite this

Waitukaitis SR, Harth K, Van Hecke M. From bouncing to floating: the Leidenfrost effect with hydrogel spheres. Physical Review Letters. 2018;121(4). doi:10.1103/PhysRevLett.121.048001
Waitukaitis, S. R., Harth, K., & Van Hecke, M. (2018). From bouncing to floating: the Leidenfrost effect with hydrogel spheres. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.121.048001
Waitukaitis, Scott R, Kirsten Harth, and Martin Van Hecke. “From Bouncing to Floating: The Leidenfrost Effect with Hydrogel Spheres.” Physical Review Letters. American Physical Society, 2018. https://doi.org/10.1103/PhysRevLett.121.048001.
S. R. Waitukaitis, K. Harth, and M. Van Hecke, “From bouncing to floating: the Leidenfrost effect with hydrogel spheres,” Physical Review Letters, vol. 121, no. 4. American Physical Society, 2018.
Waitukaitis SR, Harth K, Van Hecke M. 2018. From bouncing to floating: the Leidenfrost effect with hydrogel spheres. Physical Review Letters. 121(4), 048001.
Waitukaitis, Scott R., et al. “From Bouncing to Floating: The Leidenfrost Effect with Hydrogel Spheres.” Physical Review Letters, vol. 121, no. 4, 048001, American Physical Society, 2018, doi:10.1103/PhysRevLett.121.048001.

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