Abstract
This paper investigates stagnation point flow and heat transfer of a ferrofluid toward a stretching sheet in the presence of viscous dissipation. Three types of ferroparticles: magnetite (Fe 3O 4 ), cobalt ferrite (CoFe 2O 4), and Mn-Zn ferrite (Mn-ZnFe 2O 4) are considered with water and kerosene as conventional base fluids. Numerical solutions to the resulting ordinary differential equations are obtained by using an implicit finite-difference method with quasi-linearization technique. The effects of controlling parameters on the dimensionless velocity, temperature, skin friction, and Nusselt numbers are investigated. It is found that kerosene-based ferrofluids have higher skin friction and Nusselt numbers than water-based ferrofluids. The numerical results of skin friction are compared with the available data for special cases and are found to be in good agreement.
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