$\overline{u},\overline{v},\overline{w}$	the velocity components
${\overline{u}}_e,{\overline{v}}_e,{\overline{w}}_e$	the external flow velocities
$\overline{a},\overline{b}$	the strain shear rates
${\overline{T}}_{\infty }$	the ambient temperature
${\overline{T}}_0$	the characteristic temperature
$\overline{K}$	the permeability of porous media
$\overline{k}$	the conductivity in temperature
$c_p$	the coefficient of specific heat capacity
$C{f}_x,C{f}_y$	the coefficients of skin friction
$N{u}_x$	the Nusselt number
$A_1,A_2$	the coefficients from hybrid nanofluids
Pr	the Prandtl number
${\mathrm{Re}}_x,{\mathrm{Re}}_y$	the local Reynolds numbers
Greek symbols
$\rho$	the fluid density
μ	the dynamic viscosity
$\varphi ,{\varphi }_1,{\varphi }_2$	the volume fraction of hybrid nanofluids
γ	the ratio of shear–strain rate
σ	the coefficient of permeability