Latin symbols
Acor	cross-section area	m2
C	form drag coefficient	m−1
c	Forchheimer coefficient
Dp	equivalent spherical diameter	m
df	strut diameter	m
dp	pore diameter	m
d	characteristic pore width	m
f	friction factor
K	permeability	m2
L	length	m
Δp	pressure drop	Pa
Q	volume flow rate	m3·s−1
Re	Reynolds number
Sv	surface area per unit volume of solid	m−1
t	time	s
u	velocity	m·s−1
uD	Darcy velocity	m·s−1
up	pore velocity	m·s−1
v	velocity vector	m·s−1
V	volume	m3
Greek symbols
ρ	density	kg·m−3
μ	viscosity	kg·m−1·s−1
σ	surface area per unit volume	m−1
ε	porosity
χ	tortuosity
Subscripts
s	solid phase
tot	total