Thermal performance evaluation of a diamond-shaped roughened tube

Simple item page
dc.contributor.authorChokphoemphun, Suriya
dc.contributor.authorKamma, Panit
dc.contributor.authorPromvonge, Pongjet
dc.contributor.authorPromthaisong, Pitak
dc.date.accessioned2026-08-06T10:53:01Z
dc.date.available2026-08-06T10:53:01Z
dc.date.issued2025-12-01
dc.description.abstractThermal performance evaluation was examined numerically in a diamond-shaped roughened tube, which created recirculation and pair counter-rotation flows, which helped to disrupt the boundary layer, and increased fluid mixing led to improving the rate of heat transfer. The parameters studied, including relative depth ratio, e/D, DR, from 0.02 ≤ DR ≤ 0.14, and relative pitch ratio, p/D, PR, from 0.25 ≤ PR ≤ 1.5, under turbulent flow conditions, 3000 ≤ Re ≤ 20,000. Computed results included heat transfer (Nu/Nu<inf>0</inf>), frictional loss (f/f<inf>0</inf>) and thermal performance (in terms of thermal enhancement factor, TEF). The simulations showed that the velocity and heat transfer became fully developed periodic at around x/D ≈ 6–7.5. The pair counter-rotation flows increased the level of both the flow strength and the mixing of fluid, and disrupted the boundary layer, leading to an increase in heat transfer rate. The Nu/Nu<inf>0</inf>, f/f<inf>0</inf> and TEF were achieved in a range of 1.00–3.34, 1.21–24.00 and 0.69–1.56. The maximum TEF was found at 1.56 for DR = 0.08, PR = 0.50 and Re = 5000.
dc.identifier.citationApplied Thermal Engineering, 280, 2025
dc.identifier.doi10.1016/j.applthermaleng.2025.128311
dc.identifier.issn13594311
dc.identifier.other2-s2.0-105015831032
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17461
dc.sourceApplied Thermal Engineering
dc.subjectDiamond-shaped roughened tube
dc.subjectFrictional loss
dc.subjectHeat transfer
dc.subjectThermal performance
dc.subjectTurbulent flow
dc.titleThermal performance evaluation of a diamond-shaped roughened tube
dc.typeArticle

Files

Collections

Research