Heat transport with temperature-sensitive magnetic fluid for application to micro-cooling device

H. Yamaguchi - Y. Iwamoto

Department of Mechanical Engineering, Doshisha University, Tataramiyakodani 1-3, Kyotanabe city, Kyoto, 610-0321, Japan

Abstract
Temperature-sensitive magnetic fluid (TSMF) has temperature-dependent magnetization, with which thermal flow behavior can be actively controlled by both heat input and external magnetic field. In this paper, we design a mini-sized magnetically-driven cooling device using a binary TSMF to discuss the feasibility in an actual use for MEMS. In the present work, basic flow characteristics of the device are experimentally and numerically investigated in a mini-sized channel model. The results show that the binary TSMF can be circulated with a high flow rate (1143.7 μl/min) in a channel with an inner diameter of 1.54 mm, which implies the feasibility of application of the binary TSMF to a MEMS-cooling device. It is found that the boiling-gas behavior under a non-uniform magnetic field strongly affects the flow characteristics. Figs 5, Refs 5.