Motion of micropolar and Walters-B nanofluids towards a stretching sheet with the significance of heat generation, thermal radiation and Soret–Dufour mechanisms

Abstract

AbstractThe influences of thermal radiation, Heat Generation and Soret–Dufour on the boundary layer flow of Micropolar and Walters-B non-Newtonian fluid with MHD heat mass transfer are investigated, The formulated model resulted to set of partial differential equations [Formula: see text] The PDEs were simplified using suitable similarity variable to obtain total differential eqautions. The transformed equations were solve by employing spectral homotopy analysis method (SHAM). SHAM uses the basic concept of both Chebyshev pseudospectral method and homotopy analysis method. The outcomes for encountered flow parameters for temperature, velocity and concentration are presented with the aid of figures. An increase in the viscoelastic parameter is observed to enhance both the velocity and entire hydrodynamics boundary layer thickness. Very close to the wall the micro-rotation parameter is noticed to increase the velocity profile and negligible very far from the wall. The Prandtl number and thermal radiation parameter are noticed to increase both velocity and temperature as their values increases. As applied in various engineering processes, we hope the present study will contribute to a better understanding of boundary layer flow of non-Newtonian fluids, such as Micropolar and Walters-B. The local skin friction, local Nusselt number and local Sherwood number are also computed and investigated for different embedded parameters in the problem statements, i.e., all results are presented graphically and all physical quantities are computed and tabulated.

Keywords

• dimensionless equations
• magnetohydrodynamics (MHD)
• micropolar fluid
• Soret–Dufour
• spectral homotopy analysis method (SHAM
• Walters-B liquid)