The Effect of Thermal Radiation on Nanofluid Cooled Microchannels

摘要

This article studies thermal analysis of single phase laminar flow nanofluid cooled rectangular micro-channel heat sink (MCHS) subject to the uniform wall temperature condition. The solutions for velocity and temperature distributions are obtained from both high-aspect-ratio and low-aspect-ratio microchannels. The practical criterion for the validity of the model are used to express the cases which are assumed to produce inaccuracy in heat transfer prediction, and the participating area of base and tip plates of microchannel in radiation exchange has been defined. Radiation effects of ultra fine particles incorporated in a base coolant fluid, in heat transfer enhancement of nanofluid cooled MCHS are considered, and effects of near field thermal radiation on total heat transfer of micro heat sinks are also investigated.