Abstract
Existing thermal management strategies for mini-/micro scale electronic devices have already reached their limits in several applications, necessitating development of innovative heat transfer methods. In this context, a novel heat transfer configuration involving convective heat transfer of two-phase air-ferrofluid Taylor bubble flow in a square mini channel at low Reynolds number (Re between 70 and 150) is investigated. Presence of a magnetic field enhances local heat transfer while the pressure drop penalty is not high. Experimental results confirm significant augmentation of heat transfer coefficient, of the order of ~88% to ~95% depending on the flow Re. The augmentation strategy is particularly attractive for low Re flows, typically encountered in mini-/micro systems, where the induced magnetic forces will be able to dominate the flow inertia. Potential advantages of air-ferrofluid Taylor flows subjected to a magnetic field for heat transfer augmentation is exemplified through this study.
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