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3D Simulation on turbulent flow and heat transfer behaviors in a five-start corrugated tube: Effect of depth ratio and tube modification |
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| รหัสดีโอไอ | |
| Creator | 1. Narin Siriwan 2. Bopit Bubphachot 3. Smith Eiamsa-ard 4. Khwanchit Wongcharee 5. Teerapat Chompookham 6. Pitak Promthaisong |
| Title | 3D Simulation on turbulent flow and heat transfer behaviors in a five-start corrugated tube: Effect of depth ratio and tube modification |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2564 |
| Journal Title | Engineering and Applied Science Research |
| Journal Vol. | 48 |
| Journal No. | 6 |
| Page no. | 694-703 |
| Keyword | Heat transfer, Friction factor, Thermal enhancement factor, Swirl flow, Corrugated tube |
| URL Website | https://www.tci-thaijo.org/index.php/easr/index |
| Website title | Engineering and Applied Science Research |
| ISSN | 2539-6161 |
| Abstract | This paper presents a 3D simulation of turbulent ?ow and heat transfer behaviors in a five-start corrugated tube having depth ratios, DR = 0.02-0.16 and constant pitch ratio, PR = 1.0 0 and the Reynold number ranging from 5000 to 20,000. The effects of modified tubes: five-start vortex-flow corrugated tube and five-start cross corrugated tubes with different PR = 1.0-2.5 and constant DR = 0.06, were investigated. The results show that swirl flows were generated by the five-start corrugated tube with spiral wall while the five-start vortex-flow corrugated tube and five-start cross corrugated tube created a pair of vortex and multiple vortices flows, respectively. The modified tubes provided a heat transfer rates (range 26.8-172.1%) and thermal enhancement factor (range 12.6-90.8%) higher than the five-start corrugated tube. The five-start vortex-flow corrugated tube provided the highest thermal enhancement factor at 2.07 at DR=0.06, PR=1.5 and Re = 5000. |
