Abstract
An experimental investigation was conducted on automatic transmission fluid cooling in a minichannel heat exchanger using a closed-loop integrated thermal wind tunnel test facility. Effects of automatic transmission fluid Reynolds number (ReL) on heat transfer coefficient and Nusselt number were examined within the ReL of 3–30 for air-flow Re of 1,450–5,200. Effects of serpentine on heat transfer enhancement and flow characteristics were evaluated through Dean number analysis. The analysis of Eckert number and Brinkman number showed a contribution to the viscous heating even for a low ReL in the minichannel. The study showed enhanced heat transfer characterizations of the multi-port minichannel heat exchanger.
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