Open Access
Table 1
JCA model parameters of the two polyurethane foams (PU1 and PU2) and glass wool (GW) used in numerical simulations and experiments.
| Parameter | PU1 | GW | PU2 |
|---|---|---|---|
| Porous layer thickness hp [m] | 0.05 | 0.05 | 0.05 |
| Flow resistivity σ [N s m−4] | 3320 | 13112 | 10605 |
| Porosity ϕ [–] | 0.97 | 0.954 | 0.956 |
| Viscous characteristic length Λ [μm] | 163 | 55.6 | 71.0 |
| Thermal characteristic length Λ′ [μm] | 255 | 116 | 317 |
| Tortuosity α∞ [–] | 1.06 | 1.0 | 1.67 |
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