Table 2 Properties of the used air-saturated porous materials
Properties | pa1 | pa2 | pa3 | pa4 | pa5 | pa6 |
|---|---|---|---|---|---|---|
Porosity ϕ (%) | 3 | 1 | 1 | 1 | 1 | 1 |
Solid density ρs (103 kg/m3) | 2.1 | 2.7 | 2.7 | 2.7 | 2.75 | 2.8 |
Static permeability k0 (10−12 m2) | 10−3 | 10−4 | 10−4 | 10−4 | 10−4 | 10−4 |
Solid bulk modulus Ks (GPa) | 8.0 | 10.0 | 15.0 | 50.0 | 60.0 | 60.0 |
Frame bulk modulus Kfr (GPa) | 5.6 | 7.0 | 9.0 | 36.0 | 42.0 | 48.0 |
Shear modulus G (GPa) | 2.1 | 5.0 | 7.0 | 22.0 | 27.0 | 33.0 |
Air viscosity η (10−3 Pa s) | 0.018 | 0.018 | 0.018 | 0.018 | 0.018 | 0.018 |
Tortuosity α∞ | 4 | 8 | 8 | 8 | 8 | 8 |
Bulk conductivity σ (S/m) | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.0001 |
Fast P wave quality factor Qpf | 120 | 200 | 240 | 280 | 320 | 400 |
S wave quality factor Qs | 90 | 150 | 180 | 210 | 240 | 300 |