Analytical investigation on the combined impacts of the Soret and Dufour phenomenon in the forced convective flow of a non-Newtonian nanofluid by the movable Riga device

This paper examined the MHD flow over the Riga surface in the presence of a permeable medium with Soret and Dufour effects. The Cattaneo-Christov model is adopted to scrutinize thermal and mass diffusion. The thermal conductivity of the fluid is assumed to be varying with respect to temperature. Melting condition is also imposed. The governing system is reduced to the ordinary differential system after applying the transformation. For the analytical solution, the optimal homotopy method is used. The graphical outcomes for velocity, temperature, concentration, and entropy are plotted for different estimations of various physical variables. The velocity profile enhances for larger estimation of the fourth-grade fluid parameter but decreases for higher values of magnetic and inverse Darcy numbers. The higher values of Suret number temperature and concentration profiles show opposite results. The entropy rate enhances for radiation and Brinkman number.

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