Entropy generation and mixed convection of CuO–water near an oblique stagnation point: modified Chebyshev wavelets approach

Abstract

In this article, an analysis of CuO–water nanofluid over a moving wall with oblique stagnation point has been studied under the influence of a heat source. CuO nanoparticles having shapes of platelet, brick and spheres were used in this study. The aim of this study is to explore the impact of the shapes of nanoparticles on the flow properties near an oblique stagnation point flow. The flow system was governed by a set of nonlinear partial differential equations (PDEs). These PDEs were converted to nonlinear ordinary differential equations, which were further solved numerically using a modified Chebyshev wavelet method. The effects of parameters appeared in analysis on skin friction, local Nusselt number, velocity, temperature and entropy are plotted graphically. Streamlines are also plotted to analyze patterns of flow for different levels of stretching and different angles of strike. Tabular results are generated to specify numerical values of free parameter A, components of skin friction, local Nusselt number and stagnation point. It is found that platelets shaped nanoparticles show more efficient results for inertial and thermal boundary layer. Entropy of system is influenced by stretching, angle of intact and mixed convection parameter.