${\rho }_{nf}^{*}$	effective density
${\mu }_{nf}^{*}$	effective dynamic viscosity
$k_{nf}^{*}$	effective thermal conductivity
${\left(\rho c_p\right)}_{nf}$	effective heat capacity
$nf$	stands for nanofluid
${\rho }_p$	density of nanomaterial Al2O3-H2O
${\rho }_f$	density of host liquid
$\varphi$	fraction factor of the nanomaterial
$k_p$	thermal conductivity of Al2O3
$k_f$	thermal conductivity of the host liquid
${\left(\rho c_p\right)}_p$	heat capacity of Al2O3
${\left(\rho c_p\right)}_f$	heat capacity of host liquid
$T_1$	temperature at lower disk
$T_2$	temperature at upper disk
${\mathsf{\Phi }}^{*}$	viscous dissipation
$p$	pressure
$d_p$	diameter of nanomaterial
$k_b$	Stefan Boltzmann coefficient
$\eta$	similarity variable
$F\left(\eta \right)$	axial velocity
$F^{\prime }\left(\eta \right)$	radial velocity
$\beta \left(\eta \right)$	dimensionless temperature field
$Ec$	Eckert number
$Re$	Reynolds number
$Rd$	Radiation parameter
$Pr$	Prandtl number
$Be\left(\eta \right)$	Bejan number
$N_G\left(\eta \right)$	Entropy generation