a	Ratio of manifold width to half die thickness (W/b)
b	Half die thickness [m]
B	Parameter in Winter–Fritz equation
fp	Shape factor in Winter–Fritz model
g	Parameter in Winter–Fritz equation
H	Manifold height [m]
hs	Slit height [m]
I	Identity tensor
Ic	Definite integral definition for circular duct in Equation (22) [Pa3 s−1]
Ipp	Definite integral definition for parallel plates Equation (19) [Pa2 s−1]
k	Power-law consistency factor
m	Cross model parameter
n	Power-law index
N	Number of manifold and slit segments
Q0	Flow rate in entry [m3/s]
Qm	Flow rate in the manifold [m3/s]
Qs	Flow rate in the slit [m3/s]
R	Radius of manifold [m]
v	Velocity [m/s]
φ	Velocity variance
W	Width of channel [m]
x	Coordinate along die [m]
y	Distance between manifold and die outlet [m]
ΔPm	Incremental pressure drops in manifold [Pa]
ΔPs	Incremental pressure drops in slit [Pa]
µ	Apparent viscosity [Pa s]
µ0	Rheological parameter in Cross and Carreau–Yasuda models [Pa s]
µ∞	Rheological parameter in Cross and Carreau–Yasuda models [Pa s]
γm	Shear rate in manifold [1/s]
γs	Shear rate in slit [1/s]
γw	Shear rate at wall [1/s]
ζ	Coordinate in direction of manifold [m]
λ	Rheological parameter in Cross and Carreau–Yasuda models [s]
τ	Shear stress [Pa]
τw	Shear stress at wall [Pa]
φ	Velocity variance [m2/s2]
dPm	Differential pressure drops in manifold [Pa]
dPs	Differential pressure drops in slit [Pa]