It is found that dual solutions exist for the shrinking case, while for the stretching case, the solution is unique.
Dual solutions are found to exist when λ < 0 (shrinking case) as displayed in Figures 2 and 3.
For the shrinking case, when (lambda= -2), the momentum boundary layer for an Ag-water nanofluid is greater than that for a Cu-water nanofluid, while the opposite is observed for the stretching case when (lambda = 2).
Recently, Mansur et al. [4] studied nanofluids for magnetohydrodynamic (MHD) stagnation point flow past a permeable sheet for stretching and shrinking cases.
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They took up positions facing the audience, standing stock-still, like dolls in a shrink-wrapped case.
b β-curves in shrinking sheet case.
A dual solution appeared for the shrinking sheet case.
Dual solutions are obtained for shrinking sheet case.
The increasing values of φ decrease the local skin-friction coefficient of Au, Ag and Cu nanofluids and increase the ( -{mathit{mathsf{F}}}^{hboxhboxleft(mathsf{0}right) ) values of Al, Al2O3 and TiO2 nanofluids in stretching sheet, and an opposite effect has been seen in shrinking sheet case.
