Construction of the Aerogel Thermal Conductivity Model based on k×k Sierpinski Carpet Fractal Units

Ziwei Wang; Lijie Cai; Rui Fang; Hao Wang; Weihan Chen; Yinghe Hu; Xiaoyin Wang

doi:10.54097/2qn1kw21

Authors

Ziwei Wang
Lijie Cai
Rui Fang
Hao Wang
Weihan Chen
Yinghe Hu
Xiaoyin Wang

DOI:

https://doi.org/10.54097/2qn1kw21

Keywords:

Thermal conductivity model; optimal fractal unit structure; Sierpinski carpet model; aerogel.

Abstract

With the characteristics of low density, high specific surface area, and high porosity, aerogel boasts prominent advantages in the field of thermal protection. The thermal insulation performance of aerogel has a significant relationship with its internal microstructure. In this study, the thermal conduction model of Sierpinski aerogel filled with solid in ga

With the characteristics of low density, high specific surface area, and high porosity, aerogel boasts prominent advantages in the field of thermal protection. The thermal insulation performance of aerogel has a significant relationship with its internal microstructure. In this study, the thermal conduction model of Sierpinski aerogel filled with solid in gas is established based on the equivalent circuit method. We calculated the optimal fractal unit structure of the aerogel via its porosity, applied it to the thermal conductivity calculation of four types of aerogels, and revealed the average relative error of less than 11.58%, which is lower than the calculation results of the thermal conductivity model of the aerogel with the fractal unit structure of , indicating the effectiveness and reliability of the proposed thermal conductivity prediction model.

s is established based on the equivalent circuit method. We calculated the optimal fractal unit structure of the aerogel via its porosity, applied it to the thermal conductivity calculation of four types of aerogels, and revealed the average relative error of less than 11.58%, which is lower than the calculation results of the thermal conductivity model of the aerogel with the fractal unit structure of , indicating the effectiveness and reliability of the proposed thermal conductivity prediction model.

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