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Table 1
Properties of media used in simulated tests, taken from the literature and especially [1, 11, 13].
| Property (unit) | Foam 1 | Foam 2 | Non-woven film | Woven film |
|---|---|---|---|---|
| Open-porosity ϕ | 0.994 | 0.99 | 0.72 | 0.04 |
| Airflow resistivity σ (N s m−4) | 9045 | 65000 | 87 × 103 | 775 × 103 |
| Tortuosity α ∞ | 1.02 | 1.98 | 1.02 | 1.15 |
| Thermal CL Λ′ (μm) | 197 | 120 | 480 | 230 |
| Viscous CL Λ (μm) | 103 | 37 | 480 | 230 |
| Density ρ 1 (kg m−3) | 8.43 | 16 | 171 | 809 |
| Poisson ratio ν | 0.42 | 0.3 | 0 | 0.3 |
| Young’s modulus E (Pa) | 194.9 × 103 | 46.8 × 106 | 50 × 103 | 260 × 106 |
| Loss factor η | 0.05 | 0.1 | 0.5 | 0.5 |
CL stands for characteristic length.
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