Effect of Chemical Reaction on MHD Stagnation Flow and Heat Transfer of Fe3O4–Water Nanofluid in Porous Medium

MHD flow and heat transfer of a nanofluid impinging a flat porous plate under the effects of magnetic field and chemical reaction are investigated. Fe3O4–water nanofluid is considered as the working fluid. Similarity transformations are applied to reduce the governing partial differential equations with boundary conditions into a system of ordinary differential equations over a semi-infinite domain. Numerical approach which is developed for unbounded domains performed to give approximate solutions of the problem which are then verified by results of other researchers, showing very good agreements. The effects of the volume fraction of nanoparticles, permeability, magnetic field, chemical reaction, and Schmidt number on velocity, temperature and concentration fields are examined and graphically illustrated. The results showed that the thickness of the concentration boundary layer decreases with increasing the Schmidt number, as well as the chemical reaction coefficient.

Keywords:

MHD flow , Nanofluids , Porous media , Chemical reaction