Entropy Generation on MHD Viscoelastic Nanofluid over a Stretching Surface
نویسندگان
چکیده
This paper deals with the double-diffusive boundary layer flow of non-Newtonian nano-fluid over a stretching sheet. In this model, where binary nano-fluid is used, the Brownian motion and thermophoresis are classified as the main mechanisms which are responsible for the enhancement ofthe convection features of the nanofluid. By means of the successive approximation method the governing equations for momentum and energy have been solved. Nevertheless, these boundary-value problems can be solved correctly using expansions solutions, and we present the formulation that makes this possible (in essence, an application of Duhamel’s principle). The solutions obtained by this new approach are shown to agree identically with those obtained by using numerical method solutions. Graphical display of the numerical examine are performed to illustrate the influence of various flow parameters on the velocity, temperature, concentration, reduced Nusselt, reduced Sherwood and reduced nano-fluid Sherwood number distributions. The present study has many applications in coating and suspensions, movement of biological fluids, cooling of metallic plate, melt-spinning, heat exchangers technology, and oceanography. Someimportant findings reported in this work reveals that expansion solutions effect of momentum equations have significant impact in controlling the rate of velocity in the boundary layer region.
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