Expansion factor for diffuse layer

Input(s)

$n_{c}$: Critical Salt Concentration $(\mathrm{mol} / \mathrm{L})$

$n$: Salt Concentration $(\mathrm{mol} / \mathrm{L})$

Output(s)

$f_{d l}$: Expansion Factor (dimensionless)

Formula(s)

$$ \mathrm{f}_{\mathrm{dl}}=\left(\frac{\mathrm{n}_{\mathrm{c}}}{\mathrm{n}}\right)^{0.5} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 1, Page: 15.