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

Autor:	Wakata, Yuki, Chen, Xiaoliang, Zhu, Ning, Lyu, Sijia, Chao, Xing, Sun, Chao
Rok vydání:	2023
Předmět:	Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	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. Comment: 6 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.13767 Zobrazit plný text záznamu View this record from Arxiv