Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid
Thermal efficiency challenges are common in absorber tube designs. This study proposes an innovative absorber tube featuring dimples and petal arrays on its surface, integrated with a coiled twisted tape, and circulating a 0.9 % volume concentration of silicon carbide (SiC)-enhanced nanofluid. Fixin...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25006094 |
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| author | Hariam Luqman Azeez Adnan Ibrahim Banw Omer Ahmed Sharul Sham Dol Ali H.A. Al-Waeli Mahmoud Jaber |
| author_facet | Hariam Luqman Azeez Adnan Ibrahim Banw Omer Ahmed Sharul Sham Dol Ali H.A. Al-Waeli Mahmoud Jaber |
| author_sort | Hariam Luqman Azeez |
| collection | DOAJ |
| description | Thermal efficiency challenges are common in absorber tube designs. This study proposes an innovative absorber tube featuring dimples and petal arrays on its surface, integrated with a coiled twisted tape, and circulating a 0.9 % volume concentration of silicon carbide (SiC)-enhanced nanofluid. Fixing heat flux at 1000 W/m2 and Reynold number between 720 and 5030, Computational Fluid Dynamics (CFD) was employed to optimize key dimple parameters, encompassing dimple lines number (ranging from 2 to 6), dimple diameter (1–5 mm), dimple height (0.8–2 mm), and dimple pitch distance (10–30 mm). Additionally, Thermohydraulic Performance Factor (THPF) assessment was conducted experimentally to examine the impact of petal arrays, coil, twisted tape, and three concentrations of SiC-enhanced nanofluid on the optimized dimple tube. The results indicate that a configuration with five dimple lines, a dimple diameter of 3 mm, a dimple height of 1.4 mm, and a dimple pitch distance of 10 mm provides optimal heat transfer augmentation. Furthermore, incorporating 0.9 % SiC with a coiled twisted tape into the optimized dimpled and petaled array tube design enhances the THPF by 71.1 %, demonstrating a substantial improvement in thermohydraulic performance. |
| format | Article |
| id | doaj-art-82d78a59a38743dab46f07cfba4f85eb |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-82d78a59a38743dab46f07cfba4f85eb2025-08-20T03:47:33ZengElsevierCase Studies in Thermal Engineering2214-157X2025-08-017210634910.1016/j.csite.2025.106349Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluidHariam Luqman Azeez0Adnan Ibrahim1Banw Omer Ahmed2Sharul Sham Dol3Ali H.A. Al-Waeli4Mahmoud Jaber5Solar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, MalaysiaSolar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, Malaysia; Corresponding author.Solar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, MalaysiaDepartment of Mechanical and Industrial Engineering, Abu Dhabi University, PO Box 59911, Abu Dhabi, United Arab EmiratesEngineering Department, American University of Iraq, Sulaimani, Kurdistan Region, Sulaimani, IraqSolar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, MalaysiaThermal efficiency challenges are common in absorber tube designs. This study proposes an innovative absorber tube featuring dimples and petal arrays on its surface, integrated with a coiled twisted tape, and circulating a 0.9 % volume concentration of silicon carbide (SiC)-enhanced nanofluid. Fixing heat flux at 1000 W/m2 and Reynold number between 720 and 5030, Computational Fluid Dynamics (CFD) was employed to optimize key dimple parameters, encompassing dimple lines number (ranging from 2 to 6), dimple diameter (1–5 mm), dimple height (0.8–2 mm), and dimple pitch distance (10–30 mm). Additionally, Thermohydraulic Performance Factor (THPF) assessment was conducted experimentally to examine the impact of petal arrays, coil, twisted tape, and three concentrations of SiC-enhanced nanofluid on the optimized dimple tube. The results indicate that a configuration with five dimple lines, a dimple diameter of 3 mm, a dimple height of 1.4 mm, and a dimple pitch distance of 10 mm provides optimal heat transfer augmentation. Furthermore, incorporating 0.9 % SiC with a coiled twisted tape into the optimized dimpled and petaled array tube design enhances the THPF by 71.1 %, demonstrating a substantial improvement in thermohydraulic performance.http://www.sciencedirect.com/science/article/pii/S2214157X25006094Dimple and petal arraysSilicon carbide enhanced nanofluidCoiled twisted tapeCFDTHPF |
| spellingShingle | Hariam Luqman Azeez Adnan Ibrahim Banw Omer Ahmed Sharul Sham Dol Ali H.A. Al-Waeli Mahmoud Jaber Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid Case Studies in Thermal Engineering Dimple and petal arrays Silicon carbide enhanced nanofluid Coiled twisted tape CFD THPF |
| title | Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid |
| title_full | Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid |
| title_fullStr | Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid |
| title_full_unstemmed | Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid |
| title_short | Numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and SiC nanofluid |
| title_sort | numerical and experimental investigation of heat transfer in a dimpled and petaled array tube with a coiled twisted tape and sic nanofluid |
| topic | Dimple and petal arrays Silicon carbide enhanced nanofluid Coiled twisted tape CFD THPF |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25006094 |
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