Enhancement of laminar convective heat transfer using microparticle suspensions

Zhu, Jiu Yang, Tang, Shiyang, Yi, Pyshar, Baum, Thomas, Khoshmanesh, Khashayar and Ghorbani, Kamran (2016) Enhancement of laminar convective heat transfer using microparticle suspensions. Heat and Mass Transfer/Waerme- und Stoffuebertragung, 53 (1), 169-176. (doi:10.1007/s00231-016-1807-4).

Abstract

This paper investigates the enhancement of convective heat transfer within a sub-millimetre diameter copper tube using Al₂O₃, Co₃O₄ and CuO microparticle suspensions. Experiments are conducted at different particle concentrations of 1.0, 2.0 and 5.0 wt% and at various flow rates ranging from 250 to 1000 µl/min. Both experimental measurements and numerical analyses are employed to obtain the convective heat transfer coefficient. The results indicate a significant enhancement in convective heat transfer coefficient due to the implementation of microparticle suspensions. For the case of Al₂O₃ microparticle suspension with 5.0 wt% concentration, a 20.3 % enhancement in convective heat transfer coefficient is obtained over deionised water. This is comparable to the case of Al₂O₃ nanofluid at the same concentration. Hence, there is a potential for the microparticle suspensions to be used for cooling of compact integrated systems.

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Contributors

Author: Shiyang Tang

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