Notation
C the constant value
C 2the inertial resistance factor,
m-1
C 3 the constant value
d particle diameter, mm
g gravitational acceleration,
m2/s
H bed height, mm
H dsolid-seal height, mm
H L the assumed length, mm
L the bed length
△p pressure drop, kPa
Q volumetric gas flow rate,
m3/s
Q’ the assumed volumetric gas flow rate, m3/s
r radius of the baffle, mm
Re Reynolds number
u superficial
velocity, m/s
average axial gas superficial velocity, m/s
x horizontal position, mm
y axial position, mm
α the
permeability resistance factor,
m2
ρ density, kg/m3
μ dynamic viscosity,
kg/(m·s)
δ pinning thickness, mm
δ’ modified pinning thickness, mm
Φ the particle friction angle, °
Φ w wall friction angle, °
Φ wd Johnson net friction angle, °
shear stress, N/m2
γ the bed voidage