Abstract
Influence of magnetic field direction on the forced convective heat transfer in a rectangular duct flow of a magnetic fluid was investigated experimentally. Experiments were performed in both laminar flow and turbulent flow. Magnetic fluid flow was heated by one-side heater plate with a uniform heat flux, and uniform and non-uniform magnetic field were applied. As a results of experiments in laminar flow, in the case of applying uniform magnetic field, heat transfer enhancement by applying magnetic field perpendicular to the heat transfer direction is larger than that by applying magnetic field parallel to heat transfer direction. However, in the case of applying non-uniform magnetic field, the opposite tendency was obtained. 0n the contrary, in the case of turbulent flow, magnetic field direction hardly influence on the heat transfer. Magnetic field has a role of suppression of turbulent diffusion.
