Journal
APPLIED SCIENCES-BASEL
Volume 9, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/app9235217
Keywords
MHD; FEM; Casson nano-fluid; heat source; multiple slip; porous medium
Categories
Funding
- National Natural Science Foundation of China [51676152]
- Equipment Advance Research Field Foundation [61402070302]
- Fundamental Research Funds for the Central Universities [zrzd2017012]
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In this article, we probe the multiple-slip effects on magnetohydrodynamic unsteady Casson nano-fluid flow over a penetrable stretching sheet, sheet entrenched in a porous medium with thermo-diffusion effect, and injection/suction in the presence of heat source. The flow is engendered due to the unsteady time-dependent stretching sheet retained inside the porous medium. The leading non-linear partial differential equations are transmuted in the system of coupled nonlinear ordinary differential equations by using appropriate transformations, then the transformed equations are solved by using the variational finite element method numerically. The velocity, temperature, solutal concentration, and nano-particles concentration, as well as the rate of heat transfer, the skin friction coefficient, and Sherwood number for solutal concentration, are presented for several physical parameters. Next, the effects of these various physical parameters are conferred with graphs and tables. The exact values of flow velocity, skin friction, and Nusselt number are compared with a numerical solution acquired with the finite element method (FEM), and also with numerical results accessible in literature. In the end, we rationalize the convergence of the finite element numerical solution, and the calculations are carried out by reducing the mesh size.
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