Symbol	Unit	Description
ρ	Kg/m3	Density
u	m/s1	Superficial velocity
m	kg	Mass
Vp	m3	Pore volume
ϕ	dimensionless	Porosity
Vt	m3	Total volume
J	m/s1	Volumetric flux
ΔP	Pa	Pressure drop
∇P	kg/m2∙s2	Pressure gradient
µ	Kg/m1·s1	Dynamic viscosity
L	m	Domain thickness
H	m	Domain height
Q	m3/s1	Volumetric flow rate
k	m2	Permeability
u	m/s1	Velocity vector
β	1/m1	Inertia resistance factor
ϕareal	dimensionless	Areal porosity
Av	m2	Area of voids
At	m2	Total area
dp	m	Spherical particle diameter
Re	Dimensionless	Reynolds number
dC	m	Cell’s Feret diameter
dW	m	Window’s Feret diameter
dS	m	Strut’s length
Vv	m3	Volume of voids
Vb	m3	Volume of bulk
Vs	m3	Volume of solid matrix
T	°C	Temperature
P	Pa	Pressure
F	-	All forces other than pressure
∇2	-	Laplace operator
Dρ/Dt	-	Substantial time derivative
$\overline{\mathit{v}}$	m/s1	Intrinsic average velocity
rho0	Kg/m3	Fluid density
eta0	Kg/m1·s1	Fluid dynamic viscosity
p0	Pa	Pressure (inlet)