Nomenclature
K0	fitting parameter in Hill equation, -
L	Avogadro constant, L = 6.02214086 × 1023 mol−1
n	fitting parameter in Hill equation, -
r	radius of nanoparticles, nm
R	thermodynamic constant, R = 8.314 kJ/kmol K
t	temperature, °C
T	temperature, K
U0	zeta potential, mV
Greek Symbols
α	ratio of electrical conductivity, -
ε0	dielectric constant of vacuum, -
εr	dielectric constant of base fluid, -
φ	volume fraction of nanoparticles, -
η	viscosity, Pa.s
ρ	density, kg/m3
σ	electrical conductivity, µS/cm
Subscripts
B	refers to Brownian motion
bf	refers to base-fluid
E	refers to electrophoretic mobility
M	refers to Maxwell model
nf	refers to nanofluid
p	refers to nanoparticles
Abbreviations
ANN	artificial neural network model
BG	Bio glycol
CNT	carbon nanotubes
EDL	electrical double layer
EHD	electro hydrodynamics
EG	ethylene glycol
MHD	magneto hydrodynamics
MWCNT	multi-wall carbon nanotubes
NEIL	ionic liquids enhanced nanofluids
PG	propylene glycol
RDB	refined, bleached and deodorized (refers to oils)
SDBS	Sodium dodecyl benzenesulfonate
SDS	Sodium dodecyl sulfate
TEC	thermo-electrical conductivity
W	water