Porosity
Porosity, abbreviated as n, a dimensionless number, is the ratio between the pore volume of a substance and its total volume. Porosity of a measure of a rocks capacity to store fluids.
Porosity formulas
\(\large{ n = \frac {V_v} {V_t } }\) | |
\(\large{ n = \frac {V_v} {V_s \;+\; V_v } }\) | |
\(\large{ n = \frac { e } { 1 \;+\; e } }\) | |
\(\large{ n = \frac { v} { v_s} }\) | (seepage velocity) |
Where:
\(\large{ n }\) = porosity
\(\large{ v }\) = Darcy velocity or flux
\(\large{ v_s }\) = seepage velocity
\(\large{ V_t } \) = total volume of soil
\(\large{ e }\) = void ratio
\(\large{ V_s }\) = volume of soil
\(\large{ V_v }\) = volume of voids (air and water)