a	a curve fitting parameter
A	membrane surface area
Ar	Archimedes number
b	a curve fitting parameter
B	a constant in relationship for pressure drop at filter exchange
C up	upstream particle concentration
d p	particle diameter
D	discriminant
DHC	dust-holding capacity
DHC meas	experimentally measured dust-holding capacity
DHC exp	dust-holding capacity from exponential fit
DHC pol	dust-holding capacity from polynomial fit
DHC theor	theoretical dust-holding capacity
g	gravitational acceleration
H	humidity
K	constant describing dust and/or filter type
m	dust accumulation in filter
m HFM	instantaneous mass of dust deposited on HFM
m load	dust loading rate
m(t)	mass of dust on filter at a given time
M	final dust loading
M T	total amount of dust dosed to the chamber
∆p(m)	pressure drop as a function of dust load
∆p(t)	pressure drop as a function of time
∆pavg	average pressure drop
∆pc-o	pressure drop at change out of the filter
∆pf	final pressure drop
∆pi	initial pressure drop
Q	air flowrate
Re	Reynolds number
t	instant time of filtration
t f	final time of filtration
T	temperature
v	curve fitting parameter
x	curve fitting parameter
y	curve fitting parameter
z	curve fitting parameter
η	filtration efficiency
µ	fluid viscosity
ν p	sedimentation velocity
ξ	friction coefficient
ρ	fluid density
ρ p	particle density