Core number

Length/cm

Diameter/cm

Air permeability (10⁻³ μm²)

Porosity/%

Critical flow (mL∙min⁻¹)

Permeability

damage %

Degree of damage

204-1

5.120

2.532

0.665

27.723

0.035

3.8

No speed sensitivity

309-5

5.496

2.520

0.713

25.635

0.036

2.7

No speed sensitivity

106-7

5.276

2.492

0.459

26.458

0.043

1.9

No speed sensitivity

507-2

5.387

2.335

0.834

23.863

0.018

4.9

No speed sensitivity