Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels
To improve the thermal and hydraulic performance of symmetric wavy microchannel heat sinks, a novel design has been devised with slanted secondary channels from trough to crest based on its pressure distribution characteristics. These channels connect regions of adverse pressure gradient in any two...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016368 |
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| author | Qifeng Zhu Xianyao Liu Jingwei Zeng He Zhao Wenqiang He Haoxin Deng Guoyan Chen |
| author_facet | Qifeng Zhu Xianyao Liu Jingwei Zeng He Zhao Wenqiang He Haoxin Deng Guoyan Chen |
| author_sort | Qifeng Zhu |
| collection | DOAJ |
| description | To improve the thermal and hydraulic performance of symmetric wavy microchannel heat sinks, a novel design has been devised with slanted secondary channels from trough to crest based on its pressure distribution characteristics. These channels connect regions of adverse pressure gradient in any two neighboring channels to form a novel microchannel heat sink (SW-TC). Employing three-dimensional numerical simulations, a comparative analysis was performed on the flow and heat transfer characteristics among the SW-TC, the symmetric wavy microchannel with wave crest-to-crest secondary flow channels (SW-CC), and the symmetric wavy microchannel with wave trough-to-trough secondary channels (SW-TT). The results indicate that the design of slanted secondary channels significantly improves fluid mixing across channels, suppresses boundary layer development, and consequently enhances the heat transfer efficiency and overall performance of the SW-TC. The SW-TC achieves its peak relative Nusselt number and overall performance factor at 1.835 and 1.843, respectively. Furthermore, the SW-TC exhibits excellent temperature uniformity across the heating wall, and its temperature increase along the flow direction is a mere 8.3 K at Re = 200. It also presents the lowest entropy generation number among all designs, reaching 0.56 at Re = 100. |
| format | Article |
| id | doaj-art-a280a8f68ab847e3b745b7075696c8ef |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-a280a8f68ab847e3b745b7075696c8ef2025-01-08T04:52:38ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105605Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channelsQifeng Zhu0Xianyao Liu1Jingwei Zeng2He Zhao3Wenqiang He4Haoxin Deng5Guoyan Chen6Corresponding author.; School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaSchool of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, ChinaTo improve the thermal and hydraulic performance of symmetric wavy microchannel heat sinks, a novel design has been devised with slanted secondary channels from trough to crest based on its pressure distribution characteristics. These channels connect regions of adverse pressure gradient in any two neighboring channels to form a novel microchannel heat sink (SW-TC). Employing three-dimensional numerical simulations, a comparative analysis was performed on the flow and heat transfer characteristics among the SW-TC, the symmetric wavy microchannel with wave crest-to-crest secondary flow channels (SW-CC), and the symmetric wavy microchannel with wave trough-to-trough secondary channels (SW-TT). The results indicate that the design of slanted secondary channels significantly improves fluid mixing across channels, suppresses boundary layer development, and consequently enhances the heat transfer efficiency and overall performance of the SW-TC. The SW-TC achieves its peak relative Nusselt number and overall performance factor at 1.835 and 1.843, respectively. Furthermore, the SW-TC exhibits excellent temperature uniformity across the heating wall, and its temperature increase along the flow direction is a mere 8.3 K at Re = 200. It also presents the lowest entropy generation number among all designs, reaching 0.56 at Re = 100.http://www.sciencedirect.com/science/article/pii/S2214157X24016368Wavy microchannel heat sinkSecondary channelNumerical simulationsEntropy generationHeat transfer enhancement |
| spellingShingle | Qifeng Zhu Xianyao Liu Jingwei Zeng He Zhao Wenqiang He Haoxin Deng Guoyan Chen Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels Case Studies in Thermal Engineering Wavy microchannel heat sink Secondary channel Numerical simulations Entropy generation Heat transfer enhancement |
| title | Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| title_full | Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| title_fullStr | Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| title_full_unstemmed | Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| title_short | Numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| title_sort | numerical study of heat transfer and fluid flow in a symmetric wavy microchannel heat sink reinforced by slanted secondary channels |
| topic | Wavy microchannel heat sink Secondary channel Numerical simulations Entropy generation Heat transfer enhancement |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016368 |
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