✓ Airflow Resistivity
✓ Characteristic Lenght
✓ Open Porosity and Bulk Density (current)
✓ Static Thermal Permeablity
✓ Thermal and Viscous Lenghts
✓ Tortuosity
✓ Viscoelastic Properties
✓ Young’s Modulus, Poisson’s Ratio and Loss Factor
What are the Open Porosity and the Bulk Density?
Open Porosity
The open porosity (ϕ) is defined as the fraction of volume that is occupied by the fluid in the interconnected porous network. Non-interconnected voids trapped in the solid phase are not part of the open porosity: they are part of the closed porosity.
Bulk Density
The true bulk density (ρ) is in the vacuum density of the porous aggregate.
How to Measure the Open Porosity and the Bulk Density?
Equipment: Porosity and Density Meter
Method 1: Isothermal pressure/mass method [1]
Method 2: Missing mass method to measure open porosity of porous solid [2]
Parameters:
- ϕ – Open porosity
- ρ – True bulk density (kg/m³)
References
[1] Y. Salissou and R. Panneton, « Pressure/mass method to measure open porosity of porous solids, » J. Appl. Phys. 101, 124913(2007).
[2] R. Panneton and E. Gros, « A missing mass method to measure the open porosity of porous solids, » Acta-Acustica 91(2), 342-348 (2005).
Want to Learn More?
✓ Airflow Resistivity
✓ Characteristic Lenght
✓ Open Porosity and Bulk Density (current)
✓ Static Thermal Permeablity
✓ Thermal and Viscous Lenghts
✓ Tortuosity
✓ Viscoelastic Properties
✓ Young’s Modulus, Poisson’s Ratio and Loss Factor