Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks
A microchannel with staggered truncated ribs (MC-STR) is presented. The effects of rib height ratio (α) and rib width ratio (β) on the thermal-hydraulic performance and entropy generation are investigated by numerical simulation at the Reynolds numbers (Re) range of 223–593. Initially, to compare th...
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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/S2214157X24016289 |
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| author | Dongkai Wang Lirui Xue Chang Liu Haitao Chen Changquan Xia Qinyu Qian Liwen Cheng |
| author_facet | Dongkai Wang Lirui Xue Chang Liu Haitao Chen Changquan Xia Qinyu Qian Liwen Cheng |
| author_sort | Dongkai Wang |
| collection | DOAJ |
| description | A microchannel with staggered truncated ribs (MC-STR) is presented. The effects of rib height ratio (α) and rib width ratio (β) on the thermal-hydraulic performance and entropy generation are investigated by numerical simulation at the Reynolds numbers (Re) range of 223–593. Initially, to compare the MC-STR of different α configurations, the traditional ribbed microchannel (MC-TR) and the smooth microchannel (MC-S) are also numerically analyzed. Subsequent analysis further investigates the effect of β on convective heat transfer in MC-STR. The results indicate that MC-STR significantly enhances the heat transfer and reduces the heated wall temperature. Increasing α and β results in higher Nusselt number (Nu) and friction coefficient (f). Compared to MC-TR, MC-STR effectively reduces pressure drop losses and exhibits higher Nu at α = 0.75 and α = 0.5 for most Re. Overall, the highest comprehensive thermal performance factor (PEC) of 1.355 for MC-STR (α = 0.5, β = 0.3) is attained at Re = 593. Furthermore, the augmentation entropy generation number (Ns,a) of MC-STR (α = 0.75, β = 0.3) reaches the lowest value of 0.422 for Re = 593. |
| format | Article |
| id | doaj-art-a67c7b3248cc4294bba1e4766f9f44ba |
| 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-a67c7b3248cc4294bba1e4766f9f44ba2025-01-08T04:52:36ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105597Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinksDongkai Wang0Lirui Xue1Chang Liu2Haitao Chen3Changquan Xia4Qinyu Qian5Liwen Cheng6College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCollege of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCollege of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCollege of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCollege of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCollege of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaCorresponding author.; College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, 225002, ChinaA microchannel with staggered truncated ribs (MC-STR) is presented. The effects of rib height ratio (α) and rib width ratio (β) on the thermal-hydraulic performance and entropy generation are investigated by numerical simulation at the Reynolds numbers (Re) range of 223–593. Initially, to compare the MC-STR of different α configurations, the traditional ribbed microchannel (MC-TR) and the smooth microchannel (MC-S) are also numerically analyzed. Subsequent analysis further investigates the effect of β on convective heat transfer in MC-STR. The results indicate that MC-STR significantly enhances the heat transfer and reduces the heated wall temperature. Increasing α and β results in higher Nusselt number (Nu) and friction coefficient (f). Compared to MC-TR, MC-STR effectively reduces pressure drop losses and exhibits higher Nu at α = 0.75 and α = 0.5 for most Re. Overall, the highest comprehensive thermal performance factor (PEC) of 1.355 for MC-STR (α = 0.5, β = 0.3) is attained at Re = 593. Furthermore, the augmentation entropy generation number (Ns,a) of MC-STR (α = 0.75, β = 0.3) reaches the lowest value of 0.422 for Re = 593.http://www.sciencedirect.com/science/article/pii/S2214157X24016289Staggered truncated ribsMicrochannelComprehensive thermal performance factorHeat transferNumerical simulation |
| spellingShingle | Dongkai Wang Lirui Xue Chang Liu Haitao Chen Changquan Xia Qinyu Qian Liwen Cheng Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks Case Studies in Thermal Engineering Staggered truncated ribs Microchannel Comprehensive thermal performance factor Heat transfer Numerical simulation |
| title | Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks |
| title_full | Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks |
| title_fullStr | Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks |
| title_full_unstemmed | Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks |
| title_short | Effects of staggered truncated ribs on thermal-hydraulic performance and entropy generation of microchannel heat sinks |
| title_sort | effects of staggered truncated ribs on thermal hydraulic performance and entropy generation of microchannel heat sinks |
| topic | Staggered truncated ribs Microchannel Comprehensive thermal performance factor Heat transfer Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016289 |
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