Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs
In this study, the effects of adding trapezoidal ribs to microchannel on functionalized multi-walled nano-tubes/water nanofluid heat transfer are examined. The dimensionless slip coefficient (0–0.1), Reynolds number (50–400) and Hartmann number (0–20) are considered as independent variables and the...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-01-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
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| Online Access: | http://dx.doi.org/10.1080/19942060.2021.1984991 |
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| author | Lixuesong Han Chenji Lu Alexei Yumashev Dariush Bahrami Rasool Kalbasi Mehdi Jahangiri Arash Karimipour Shahab S. Band Kwok-Wing Chau Amir Mosavi |
| author_facet | Lixuesong Han Chenji Lu Alexei Yumashev Dariush Bahrami Rasool Kalbasi Mehdi Jahangiri Arash Karimipour Shahab S. Band Kwok-Wing Chau Amir Mosavi |
| author_sort | Lixuesong Han |
| collection | DOAJ |
| description | In this study, the effects of adding trapezoidal ribs to microchannel on functionalized multi-walled nano-tubes/water nanofluid heat transfer are examined. The dimensionless slip coefficient (0–0.1), Reynolds number (50–400) and Hartmann number (0–20) are considered as independent variables and the heat transfer along with the entropy generation are considered as the output parameters. The simulation outcomes confirm that the addition of trapezoidal ribs, on the one hand, increases the heat transfer area and, on the other hand, intensifies the possibility of vortex formation. The presence of a vortex decreases the heat transfer potential and thus reduces the performance of the trapezoidal-wall microchannel compared to the base one. With increasing Reynolds number (Re), the probability of vortex formation intensifies, which in turn diminishes the positive effects of using trapezoidal ribs. However, it is found that, with increasing Hartmann number (Ha) and dimensionless slip coefficient $ ({{\beta^\ast }} ) $ , the vortex strength is weakened, and consequently heat transfer is improved. Based on numerical computations, it is found that at Re = 400, Ha = 0 and $ {\beta ^\ast } $ = 0 and adding trapezoidal ribs to the base microchannel increases heat transfer by 11.12%. |
| first_indexed | 2024-04-11T16:52:24Z |
| format | Article |
| id | doaj.art-98ecede0123a49608450ef17f67f733b |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-04-11T16:52:24Z |
| publishDate | 2021-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-98ecede0123a49608450ef17f67f733b2022-12-22T04:13:23ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2021-01-011511746176010.1080/19942060.2021.19849911984991Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribsLixuesong Han0Chenji Lu1Alexei Yumashev2Dariush Bahrami3Rasool Kalbasi4Mehdi Jahangiri5Arash Karimipour6Shahab S. Band7Kwok-Wing Chau8Amir Mosavi9ShanghaiTech UniversityUniversity of SouthamptonDepartment of Prosthetic Dentistry, The State Education Institution of Higher Professional Training, The First Sechenov Moscow State Medical University under Ministry of Health of the Russian Federation, Moscow, Russian FederationShahrekord UniversityNajafabad Branch, Islamic Azad UniversityShahrekord Branch, Islamic Azad UniversityNajafabad Branch, Islamic Azad UniversityFuture Technology Research Center, College of Future, National Yunlin University of Science and Technology, Douliou, TaiwanHong Kong Polytechnic UniversityTechnische Universität DresdenIn this study, the effects of adding trapezoidal ribs to microchannel on functionalized multi-walled nano-tubes/water nanofluid heat transfer are examined. The dimensionless slip coefficient (0–0.1), Reynolds number (50–400) and Hartmann number (0–20) are considered as independent variables and the heat transfer along with the entropy generation are considered as the output parameters. The simulation outcomes confirm that the addition of trapezoidal ribs, on the one hand, increases the heat transfer area and, on the other hand, intensifies the possibility of vortex formation. The presence of a vortex decreases the heat transfer potential and thus reduces the performance of the trapezoidal-wall microchannel compared to the base one. With increasing Reynolds number (Re), the probability of vortex formation intensifies, which in turn diminishes the positive effects of using trapezoidal ribs. However, it is found that, with increasing Hartmann number (Ha) and dimensionless slip coefficient $ ({{\beta^\ast }} ) $ , the vortex strength is weakened, and consequently heat transfer is improved. Based on numerical computations, it is found that at Re = 400, Ha = 0 and $ {\beta ^\ast } $ = 0 and adding trapezoidal ribs to the base microchannel increases heat transfer by 11.12%.http://dx.doi.org/10.1080/19942060.2021.1984991trapezoidal ribsvortexentropy generationmagnetic fieldnanofluidslip |
| spellingShingle | Lixuesong Han Chenji Lu Alexei Yumashev Dariush Bahrami Rasool Kalbasi Mehdi Jahangiri Arash Karimipour Shahab S. Band Kwok-Wing Chau Amir Mosavi Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs Engineering Applications of Computational Fluid Mechanics trapezoidal ribs vortex entropy generation magnetic field nanofluid slip |
| title | Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| title_full | Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| title_fullStr | Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| title_full_unstemmed | Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| title_short | Numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| title_sort | numerical investigation of magnetic field on forced convection heat transfer and entropy generation in a microchannel with trapezoidal ribs |
| topic | trapezoidal ribs vortex entropy generation magnetic field nanofluid slip |
| url | http://dx.doi.org/10.1080/19942060.2021.1984991 |
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