Enhanced heat transfer performance in channel with delta-wing perforated V-type baffles

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dc.contributor.authorEiamsa-ard, Smith
dc.contributor.authorPhila, Arnut
dc.contributor.authorThianpong, Chinaruk
dc.contributor.authorChuwattanakul, Varesa
dc.contributor.authorMaruyama, Naoki
dc.contributor.authorHirota, Masafumi
dc.date.accessioned2026-08-06T10:42:27Z
dc.date.available2026-08-06T10:42:27Z
dc.date.issued2023-10-01
dc.description.abstractThe article examines the influence of delta-wing V-type baffles (DW-PVBs) on the average Nusselt number, local Nusselt number distribution, pressure losses, and thermal performance behaviors in a channel. Delta-wing perforated V-type baffles (DW-PVBs) mounted in a regular manner on the bottom of a channel produced two pairs of longitudinal counter-rotating vortices to enhance chaotic fluid mixing and destabilize the boundary layer, hence boosting the heat transfer. The geometric characteristics of the delta-wing V-type baffle (DW-PVBs) located on the bottom of the channel were examined at relative baffle blockage and pitch ratios (BR = h/H = 0.3 and p/H = 1.5), and five delta-wing attack angles, θ = 0<sup>o</sup> (solid V-shaped baffle), 22.5°, 45°, 67.5°, and 90°. The present DW-PVBs mounted on the channel were designed to mitigate pressure loss due to flow blockage. The experiment was done by permitting air to flow through a channel at Reynolds numbers (Re) ranging from 6000 to 24,000. The present results show that the friction factor using the DW-PVBs decreased considerably with increasing θ values. The experimental results revealed that small θ values yielded greater heat transfer and resistance than large θ values. The DW-PVBs with θ = 22.5° performed better than inserts with other θ values in terms of heat transfer rate. It was also observed that the DW-PVBs with θ = 45° gave the maximum thermal performance factor (TPF), while presenting a 13.64–17.26% lower friction factor than the solid V-shaped baffle. Furthermore, it was also found that the DW-PVBs with θ = 0°, 22.5°, 45°, 67.5°, and 90° gave peak TPF values of up to 1.87, 1.89, 1.91, 1.87, and 1.84 at the lowest Reynolds number, 6000.
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, 148(20), 11283-11301, 2023
dc.identifier.doi10.1007/s10973-023-12452-2
dc.identifier.issn13886150
dc.identifier.other2-s2.0-85169167110
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/14668
dc.sourceJournal of Thermal Analysis and Calorimetry
dc.subjectDelta-wing
dc.subjectHeat transfer
dc.subjectHeat transfer enhancement
dc.subjectTurbulent flow
dc.subjectV-type baffle
dc.titleEnhanced heat transfer performance in channel with delta-wing perforated V-type baffles
dc.typeArticle

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