Abstract
The combined effect of Soret-Dufour, higher-order chemical reaction and variable thermophysical properties on nonlinear thermal and solutal convective flow of a non-Newtonian fluid (Casson nanofluid) over a slanted surface is analyzed. The nonlinear dimensionless equations governing the fluid flow are transformed into ordinary differential equations, using suitable similarity transformation variables. The flow fields and some characteristic numerical results are obtained from these equations, using collocation method with assumed Legendre functions of the first kind. These results are presented in the form of graphs and tables showing the impact of various parameters on the fluid flow, heat and mass characteristics. It is observed that a rise in chemical reaction parameter decreases the nanoparticle volume fraction while a higher order of chemical reaction makes it elevated. The velocity increases and temperature decreases with a rise in nonlinear thermal convection and higher value of nonlinear solutal convection has effect on the rise of velocity distribution.
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