Review Article
Aerogels in Aerospace: An Overview
Table 2
Approaches to predict the thermal conductivity of silica aerogels (adapted from Jun-Jie et al. [
66]).
| Model | Author | Structure representation | Method | Comments |
| Empirical | Lu et al. [60] Wang et al. [67] | Ignored | Volume average as a function of density or porosity | Cannot be applied for aerogels with different microstructures |
| Analytical |
Wei et al. [10] Lu et al. [65] Wei et al. [10] | Cubic array of nanospherical structure | Standard equivalent circuit method | Cannot represent the randomness and complexity of aerogels |
Jun-Jie et al. [66] | 3D random DLCA structure | Standard equivalent circuit with improved analytical parallel-series model | Does not require any empirical parameters as input |
| Numerical | Spagnol et al. [68] Zhao et al. [12] | Von Koch snowflake fractal structure and random DLCA structure | Finite volume method based on the mesh division | 3D calculations are time consuming |
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