Reynolds numbers (ReGS = 54–142 and ReLS = 131–373), the experiments
were performed in parallel rectangular micro-channels to
obtain flow pattern and heat transfer data. The conclusions from
this study can be drawn as follows.
1. Slug flow can result in higher heat transfer enhancement in
comparison to gas core flow.
2. The Nusselt number increases with the increase in superficial
Reynolds numbers.
3. Two-phase gas–liquid flow yields heat transfer enhancement
up to 80% when compared with the single-phase liquid flow.