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. 2021 Jul 27;12(8):887. doi: 10.3390/mi12080887
Nomenclature Greek Symbols
a Constant β Magnetic parameter
Bi Biot number η Dimensionless similarity variable
cf Skin friction coefficient φ Nanoparticles volume fraction
Ec Eckert number κ Thermal conductivity
H 0 Uniform magnetic field ρ Density
h Convective heat transfer coefficient ρcp Heat capacity
k Mean absorption coefficient μ^ Magnetic permeability
Nu Nusselt number μe Magnetic diffusivity
Pr Prandtl number μ Dynamic viscosity
qr Radiative heat flux υ Kinematic viscosity
qw Heat transfer at wall σ Stefan-Boltzmann constant
R Radiation parameter θ Dimensionless temperature
Re Reynolds number τw Wall shear stress
s Nanoparticles shape factor ε Temperature ratio parameter
T Fluid temperature Subscripts
Tw Surface temperature hnf Hybrid nanofluid
T Ambient temperature f Base fluid
u, w Velocity components in r-, z- directions. w Surface condition
Uw Stretching velocity Ambient condition
U Ambient velocity s1,s2 Shape factors of Copper and
Alumina