Thermo-Physical Properties of Magnetic Fluid and Heat Transfer by Natural Convection around a Horizontal Enclosed Rectangular Container in a Vertical Magnetic Field

Abstract

Thermo-physical properties of magnetic fluid (solvent: water, nanoparticulates: magnetite) were elucidated in order to examine their temperature dependency in both non-magnetic and vertical magnetic fields. The characteristics of heat transfer by natural convection were also investigated in non-magnetic and vertical magnetic fields in a horizontal enclosed rectangular container whose bottom plate was heated uniformly. The heat transfer of magnetic fluid in a horizontal enclosed rectangular container was found to decrease with increasing magnetic flux density, and this phenomenon was confirmed by thermal visualization using infrared thermography.