Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow
The thermohydraulic performance of perforated pin-fin heat sinks (PPFHS) with different groove geometries around pin-fin perforation circumference is numerically investigated using ANSYS Fluent under turbulent flow conditions with Reynolds numbers (Re) ranging from 24,484 to 55,088. Four groove geom...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25004447 |
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| author | Athasit Wongcharoen Jenn-Kun Kuo Wei-Cheng Wang Parinya Ackaradetruangsri Naratip Sangsai Pawat Jantasorn Ukrit Thamma |
| author_facet | Athasit Wongcharoen Jenn-Kun Kuo Wei-Cheng Wang Parinya Ackaradetruangsri Naratip Sangsai Pawat Jantasorn Ukrit Thamma |
| author_sort | Athasit Wongcharoen |
| collection | DOAJ |
| description | The thermohydraulic performance of perforated pin-fin heat sinks (PPFHS) with different groove geometries around pin-fin perforation circumference is numerically investigated using ANSYS Fluent under turbulent flow conditions with Reynolds numbers (Re) ranging from 24,484 to 55,088. Four groove geometries—trapezoid, half-circle, rectangle, and triangle—are assessed for their effects on convective heat transfer efficiency, hydraulic resistance, and overall thermohydraulic performance. The groove sizes are designed to maintain a consistent air-solid interfacial surface area to total volume ratio across all configurations. The study finds that the trapezoid-grooved PPFHS exhibits the highest Nusselt number (Nu), achieving improvements of 11.8 %–20.9 % compared to the ungrooved PPFHS over the investigated Re range. The half-circle, rectangle, and triangle grooves show Nu enhancements of 10.9–20.2 %, 10.9–20.1 %, and 9.87–18.6 %, respectively. Friction factor reductions range from 4.35 to 8.57 %, 4.22–7.71 %, 3.10–6.62 %, and 0.87–5.05 % for the trapezoid, half-circle, rectangle, and triangle grooves, respectively. The thermal performance factor (TPF) of the trapezoid-grooved PPFHS is the highest, with improvements of 13.5–24.5 % over the ungrooved design, followed by the half-circle (12.5–23.4 %), rectangle (12.1–22.9 %), and triangle (10.2–20.7 %) grooves. While TPF increases with Re, a diminishing rate of enhancement is observed at higher Re. The superior performance of the trapezoid groove is attributed to its ability to promote the most efficient airflow through the perforations while maintaining the lowest perimeter-to-cross-sectional area ratio. |
| format | Article |
| id | doaj-art-a9dceee96bea4ceb9809c3406291cd64 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-a9dceee96bea4ceb9809c3406291cd642025-08-20T02:01:39ZengElsevierCase Studies in Thermal Engineering2214-157X2025-07-017110618410.1016/j.csite.2025.106184Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flowAthasit Wongcharoen0Jenn-Kun Kuo1Wei-Cheng Wang2Parinya Ackaradetruangsri3Naratip Sangsai4Pawat Jantasorn5Ukrit Thamma6Department of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, ThailandDepartment of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung, 804, Taiwan, ROCDepartment of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 70101, Taiwan, ROC; International Degree Program on Energy Engineering, National Cheng Kung University, Tainan, 70101, Taiwan, ROCDepartment of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, ThailandDepartment of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, ThailandDepartment of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, ThailandDepartment of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; Corresponding author.The thermohydraulic performance of perforated pin-fin heat sinks (PPFHS) with different groove geometries around pin-fin perforation circumference is numerically investigated using ANSYS Fluent under turbulent flow conditions with Reynolds numbers (Re) ranging from 24,484 to 55,088. Four groove geometries—trapezoid, half-circle, rectangle, and triangle—are assessed for their effects on convective heat transfer efficiency, hydraulic resistance, and overall thermohydraulic performance. The groove sizes are designed to maintain a consistent air-solid interfacial surface area to total volume ratio across all configurations. The study finds that the trapezoid-grooved PPFHS exhibits the highest Nusselt number (Nu), achieving improvements of 11.8 %–20.9 % compared to the ungrooved PPFHS over the investigated Re range. The half-circle, rectangle, and triangle grooves show Nu enhancements of 10.9–20.2 %, 10.9–20.1 %, and 9.87–18.6 %, respectively. Friction factor reductions range from 4.35 to 8.57 %, 4.22–7.71 %, 3.10–6.62 %, and 0.87–5.05 % for the trapezoid, half-circle, rectangle, and triangle grooves, respectively. The thermal performance factor (TPF) of the trapezoid-grooved PPFHS is the highest, with improvements of 13.5–24.5 % over the ungrooved design, followed by the half-circle (12.5–23.4 %), rectangle (12.1–22.9 %), and triangle (10.2–20.7 %) grooves. While TPF increases with Re, a diminishing rate of enhancement is observed at higher Re. The superior performance of the trapezoid groove is attributed to its ability to promote the most efficient airflow through the perforations while maintaining the lowest perimeter-to-cross-sectional area ratio.http://www.sciencedirect.com/science/article/pii/S2214157X25004447Groove geometryPin-fin perforationsPin-fin heat sinksThermohydraulic behaviorTurbulent flow |
| spellingShingle | Athasit Wongcharoen Jenn-Kun Kuo Wei-Cheng Wang Parinya Ackaradetruangsri Naratip Sangsai Pawat Jantasorn Ukrit Thamma Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow Case Studies in Thermal Engineering Groove geometry Pin-fin perforations Pin-fin heat sinks Thermohydraulic behavior Turbulent flow |
| title | Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow |
| title_full | Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow |
| title_fullStr | Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow |
| title_full_unstemmed | Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow |
| title_short | Effects of groove geometry around pin-fin perforation circumference on thermohydraulic behavior of pin-fin heat sinks under turbulent flow |
| title_sort | effects of groove geometry around pin fin perforation circumference on thermohydraulic behavior of pin fin heat sinks under turbulent flow |
| topic | Groove geometry Pin-fin perforations Pin-fin heat sinks Thermohydraulic behavior Turbulent flow |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25004447 |
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