Compares thermo-hydraulic performance of teardrop-dimpled and helical-grooved tubes, highlighting better heat transfer with dimples.
• Teardrop dimples achieved PEC up to 1.895 at Re = 5000. • Inline V increased Nu by 154.8% versus the smooth tube. • Dimpled tubes outperformed grooved tubes in thermo-hydraulics. • CRVP-induced mixing strongly enhanced near-wall heat transfer. • Optimized dimples maintained PEC > 1.37 at Re = 15000.
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Parcheforosh et al. (2026) studied this question.
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