Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel
This study investigates the enhanced heat transfer performance and flow instability in three types of manifold microchannels heat sinks: parallel manifold microchannel (PMMC), interrupted manifold microchannel (IMMC), and oblique break manifold microchannel (OMMC). The microchannels are fabricated o...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25009177 |
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| author | Ping Liu Zhiwen Wang Wenlong Zheng Shiming Sang Lianghong Hu Ruiqi Sun Yi Jin |
| author_facet | Ping Liu Zhiwen Wang Wenlong Zheng Shiming Sang Lianghong Hu Ruiqi Sun Yi Jin |
| author_sort | Ping Liu |
| collection | DOAJ |
| description | This study investigates the enhanced heat transfer performance and flow instability in three types of manifold microchannels heat sinks: parallel manifold microchannel (PMMC), interrupted manifold microchannel (IMMC), and oblique break manifold microchannel (OMMC). The microchannels are fabricated on oxygen-free copper substrates using electrical discharge machining (EDM). The experiments utilize deionized water at varied mass flux (1389 kg m−2 s−1 to 5556 kg·m− 2·s−1) and inlet temperatures (20 °C and 50 °C), and the effects of heat flux on flow boiling characteristics, pressure drop, and thermal performance are analyzed. Results demonstrate that OMMC has the best overall heat transfer performance, particularly under high heat flux conditions, with a lower wall temperature compared to PMMC and IMMC. However, IMMC exhibits superior thermal uniformity, making it ideal for applications requiring stable temperature distribution. Moreover, as the mass flux increases, the pressure drop fluctuations of IMMC and OMMC show a nonlinear variation, which needs to be combined with the structural design to optimize the system stability. These findings provide critical insights for optimizing microchannel heat sink designs in high-performance cooling applications. |
| format | Article |
| id | doaj-art-bbef1d83608549d382e9d91728259ae3 |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-bbef1d83608549d382e9d91728259ae32025-08-20T03:11:46ZengElsevierCase Studies in Thermal Engineering2214-157X2025-09-017310665710.1016/j.csite.2025.106657Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannelPing Liu0Zhiwen Wang1Wenlong Zheng2Shiming Sang3Lianghong Hu4Ruiqi Sun5Yi Jin6Corresponding author.; School of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaSchool of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, ChinaThis study investigates the enhanced heat transfer performance and flow instability in three types of manifold microchannels heat sinks: parallel manifold microchannel (PMMC), interrupted manifold microchannel (IMMC), and oblique break manifold microchannel (OMMC). The microchannels are fabricated on oxygen-free copper substrates using electrical discharge machining (EDM). The experiments utilize deionized water at varied mass flux (1389 kg m−2 s−1 to 5556 kg·m− 2·s−1) and inlet temperatures (20 °C and 50 °C), and the effects of heat flux on flow boiling characteristics, pressure drop, and thermal performance are analyzed. Results demonstrate that OMMC has the best overall heat transfer performance, particularly under high heat flux conditions, with a lower wall temperature compared to PMMC and IMMC. However, IMMC exhibits superior thermal uniformity, making it ideal for applications requiring stable temperature distribution. Moreover, as the mass flux increases, the pressure drop fluctuations of IMMC and OMMC show a nonlinear variation, which needs to be combined with the structural design to optimize the system stability. These findings provide critical insights for optimizing microchannel heat sink designs in high-performance cooling applications.http://www.sciencedirect.com/science/article/pii/S2214157X25009177Manifold microchannelHeat transferHeat transfer coefficientFlow boilingInstability |
| spellingShingle | Ping Liu Zhiwen Wang Wenlong Zheng Shiming Sang Lianghong Hu Ruiqi Sun Yi Jin Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel Case Studies in Thermal Engineering Manifold microchannel Heat transfer Heat transfer coefficient Flow boiling Instability |
| title | Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| title_full | Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| title_fullStr | Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| title_full_unstemmed | Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| title_short | Experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| title_sort | experimental study on enhanced heat transfer characteristics and flow instability of manifold microchannel |
| topic | Manifold microchannel Heat transfer Heat transfer coefficient Flow boiling Instability |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25009177 |
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