Porosity

Overview

Engineering reference data for Porosity in miscellaneous.

Key Formulas

Unit Conversion

$y = x \cdot k$

Multiply by conversion factor.

Linear Interpolation

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

Percentage

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

Variables

Porosity Formula

The porosity $n$ is defined as the volume not occupied by solid material:

$n = \frac{V_v}{V} = 1 - \frac{\rho_{\text{bulk}}}{\rho_{\text{solid}}}$

Where:

• $n$ - porosity
• $V_v$ - void volume (m³, ft³)
• $V$ - total volume (m³, ft³)
• $\rho_{\text{bulk}}$ - bulk density (kg/m³, slugs/ft³)
• $\rho_{\text{solid}}$ - solid density (kg/m³, slugs/ft³)

References

• Original Source