Abstract
The objective of this study is to numerically investigate the thermodynamic behaviors of a magnetic fluid with nano-sized magnetic particles in a thin channel. The numerical model developed using the FEM (finite element method) technique with mesh sensitivity analysis was validated with existing data and thermodynamic characteristics such as isotherms, streamlines and Nusselt numbers of the magnetic fluid were analyzed with variations of the composition of magnetite, the aspect ratio, the magnetic field intensity and the inclination angle of the channel. The numerical analysis showed the increase in the magnetic volume force in the thin channel with increasing magnetic field intensity and magnetic fluid viscosity. Under all magnetic field intensities, the mean Nusselt numbers of the magnetic fluid in the thin channel at the inclination angle of 45° were on average 77.9% higher than those at the inclination angle of 15° due to the increased convective heat transfer in the thin channel.
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