Flow Analysis of y-Al2O3 Nanofluid Near a Stagnation Point

Abstract

This thesis examines the flow analysis of Al2O3 NF near a stagnation point over a stretching/shrinking sheet. In the momentum equation, the velocity-ratio effect is also employed. The influence of non-linear thermal radiation R is integrated in the heat equation. Velocity slip is also incorporated at the solid-liquid interface. Further, the effect of mass transfer in addition to chemical-reaction rate R is also considered. Moreover, 2 6 2 C H O is considered as base-fluid. In this work, firstly, the governing boundary equations are converted into ODEs by utilizing similarity variables. In order to tackle the non-dimensionless ODEs numerically, the Runge-Kutta algorithm scheme (4th - order) is employed along with shooting-technique. To acquire numerical procedure, a computer software based MATLAB is implemented as a tool. Six parameters are examined i.e. velocity-ratio reaction-rate , velocity slip ,thermal radiation R, Schmidt number Sc, and power-law index n for the problem. The impact of the above mentioned parameters on the velocity f ,temperature , and concentration fields is portrayed graphically respectively. The research indicates that when the velocity-ratio parameter is greater, the momentum boundary layers thickness increases but concentration boundary-layers thickness decreases. Moreover, for increasing Sc and , x Sh is greater but x Sh decreases in case of increasing Sc and n.