Affiliations: [a] Department of Mechanical Engineering, Tokyo University
of Science, Chiba, Japan | [b] School of Chemical Engineering, ZhengZhou University,
Henan, China | [c] Department of Mechanical Engineering, Keio University,
Tokyo, Japan
Correspondence:
[*]
Corresponding author: Masaaki Motozawa, Department of Mechanical
Engineering, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510,
Japan. Tel.: +81 4 7124 1501 (ext. 3963); Fax: +81 4 7123 9814; E-mail:
motozawa@rs.noda.tus.ac.jp
Abstract: Forced convective heat transfer characteristics in a rectangular
duct flow of a magnetic fluid under a magnetic field were investigated
experimentally. Experiments were performed in which the magnetic field
intensity was changed from 0 mT to 500 mT. The Reynolds number based on the
hydraulic diameter was set to 820 (laminar flow), 1630 and 2450 (turbulent
flow). The magnetic fluid in the rectangular duct was heated with a uniform
heat flux. The results of the experiments showed that in the case of laminar
flow of the magnetic fluid, when the magnetic field is applied to the magnetic
fluid flow, the heat transfer coefficient increases locally in the region where
the magnetic field exists. In contrast, in the turbulent flow of the magnetic
fluid, heat transfer is not enhanced, but slightly decreases.
Keywords: Magnetic fluid, Forced convective heat transfer, Rectangular duct
