Slip effects on unsteady stagnation point flow of a nanofluid over a stretching sheet

摘要: Abstract Unsteady two-dimensional stagnation point flow of a nanofluid over stretching sheet is investigated numerically. In contrast to the conventional no-slip condition at surface, Navier's slip has been applied. The behavior was for three different nanoparticles in water-base fluid, namely copper, alumina and titania. Employing similarity variables, governing partial differential equations including continuity, momentum energy have reduced ordinary ones solved via Runge–Kutta–Fehlberg scheme. It shown that dual solution exists negative values unsteadiness parameter A and, as it increases, skin friction Cfr grows but heat transfer rate Nur takes decreasing trend. results also indicated that, unlike e, increasing λ widen ranges which exists. Furthermore, found an increase both e intensifies rate.