How roughness and thermal properties of a solid substrate determine the 
Leidenfrost temperature: Experiments and a model

Wakata, Yuki; Zhu, Ning; Chen, Xiaoliang; Lyu, Sijia; Lohse, Detlef; Chao, Xing; Sun, and Chao

doi:10.1103/PhysRevFluids.8.L061601

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How roughness and thermal properties of a solid substrate determine the Leidenfrost temperature: Experiments and a model

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Lohse, Detlef
Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Wakata, Y., Zhu, N., Chen, X., Lyu, S., Lohse, D., Chao, X., et al. (2023). How roughness and thermal properties of a solid substrate determine the Leidenfrost temperature: Experiments and a model. Physical Review Fluids, 8(6): L061601. doi:10.1103/PhysRevFluids.8.L061601.

Cite as: https://hdl.handle.net/21.11116/0000-000D-5975-C

Abstract

In this Letter, we systematically investigate the Leidenfrost temperature for hot solid substrates with various thermal diffusivities and surface roughnesses. Based on the experimental results, we build a phenomenological model that considers the thermal diffusivity of a solid substrate and derive a relationship between the surface roughness and the resulting vapor film thickness. The generality of this model is supported by experimental data for different liquids and solid substrates. Our model thus allows for a theoretical prediction of the Leidenfrost temperature and develops a comprehensive understanding of the Leidenfrost effect.