Table 5 Effect of unsteadiness and the solid volume fraction on the skin friction coefficient and a comparison of bvp4c with SRM for different values of nanoparticle volume fraction with CuO-water nanofluid for fixed values of $\mathit{P}\mathit{r}\mathbf{=}\mathbf{6.7850}$ , $\mathit{D}\mathbf{=}\mathbf{1}$ , ${\mathit{r}}_{\mathbf{1}}\mathbf{=}\mathbf{2}$ , $\mathit{m}\mathbf{=}\mathbf{1.5}$ , ${\mathit{N}}_{\mathit{R}}\mathbf{=}\mathbf{1}$ and $\mathit{\omega }\mathbf{=}\mathbf{0.75}$

S

ϕ

bvp4c

Iter

$\mathbf{-}{\mathbf{f}}^{″}\mathbf{(}\mathbf{0}\mathbf{)}$

Iter

$\mathbf{-}{\mathbf{f}}^{″}\mathbf{(}\mathbf{0}\mathbf{)}$