Units

Symbol	Variable	Unit
w	Mass flowrate	kg/s
D	Diameter	m
A	Cross sectional area	m2
v	Specific volume	m3/kg
f	Friction factor	-
L	Pipe length	m
P	Pressure	Pa
Re	Reynolds number	-
ρ	Density	kg/m3
u	Mean velocity	m/s
μ	Mean viscosity	Pa.s
T	Temperature	K
R	Gas constant	(m3.Pa)/(K.mol)
m	Molecular mass	kg/mol