Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure
In this article, a model is developed for unsteady natural convection heat transfer and fluid flow in a partially cooled enclosure with a hollow cylinder through it. The right vertical wall of the enclosure is cooled partially. The location of the partial cooling is set up in three different configu...
| Main Authors: | , , , , , |
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| Format: | Article |
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Taylor & Francis
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/34550/ |
| _version_ | 1848847804319924224 |
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| author | Rahman, M. M. Oztop, Hakan Fehmi Mekhilef, Saad Saidur Rahman, Ahsan, Amimul Al-Salem, Khaled |
| author_facet | Rahman, M. M. Oztop, Hakan Fehmi Mekhilef, Saad Saidur Rahman, Ahsan, Amimul Al-Salem, Khaled |
| author_sort | Rahman, M. M. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this article, a model is developed for unsteady natural convection heat transfer and fluid flow in a partially cooled enclosure with a hollow cylinder through it. The right vertical wall of the enclosure is cooled partially. The location of the partial cooling is set up in three different configurations; namely, bottom (P 1), middle (P 2), and top (P 3). A hollow cylinder is located at the middle of the enclosure to simulate a double-pipe heat exchanger. Three values of Grashof number are applied in this work, i.e., 104, 105 and 106, and three lengths of the cooler, i.e., 0.2, 0.4 and 0.6. Finite element method was utilized to solve the unsteady dimensionless conservation equations of mass, momentum and energy. It is found that the length and location of cooler does not have a significant effect on the natural convection for the case of the low Grashof number. The maximum heat transfer rate is reached when the cooler is located at the middle of the vertical wall. |
| first_indexed | 2025-11-15T09:24:25Z |
| format | Article |
| id | upm-34550 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T09:24:25Z |
| publishDate | 2014 |
| publisher | Taylor & Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-345502015-12-16T01:24:00Z http://psasir.upm.edu.my/id/eprint/34550/ Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure Rahman, M. M. Oztop, Hakan Fehmi Mekhilef, Saad Saidur Rahman, Ahsan, Amimul Al-Salem, Khaled In this article, a model is developed for unsteady natural convection heat transfer and fluid flow in a partially cooled enclosure with a hollow cylinder through it. The right vertical wall of the enclosure is cooled partially. The location of the partial cooling is set up in three different configurations; namely, bottom (P 1), middle (P 2), and top (P 3). A hollow cylinder is located at the middle of the enclosure to simulate a double-pipe heat exchanger. Three values of Grashof number are applied in this work, i.e., 104, 105 and 106, and three lengths of the cooler, i.e., 0.2, 0.4 and 0.6. Finite element method was utilized to solve the unsteady dimensionless conservation equations of mass, momentum and energy. It is found that the length and location of cooler does not have a significant effect on the natural convection for the case of the low Grashof number. The maximum heat transfer rate is reached when the cooler is located at the middle of the vertical wall. Taylor & Francis 2014 Article PeerReviewed Rahman, M. M. and Oztop, Hakan Fehmi and Mekhilef, Saad and Saidur Rahman, and Ahsan, Amimul and Al-Salem, Khaled (2014) Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure. Numerical Heat Transfer, Part A: Applications: An International Journal of Computation and Methodology, 66 (5). pp. 582-603. ISSN 1040-7782; ESSN: 1521-0634 http://www.tandfonline.com/doi/abs/10.1080/10407782.2014.885254 10.1080/10407782.2014.885254 |
| spellingShingle | Rahman, M. M. Oztop, Hakan Fehmi Mekhilef, Saad Saidur Rahman, Ahsan, Amimul Al-Salem, Khaled Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title | Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title_full | Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title_fullStr | Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title_full_unstemmed | Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title_short | Modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| title_sort | modeling of unsteady natural convection for double-pipe in a partially cooled enclosure |
| url | http://psasir.upm.edu.my/id/eprint/34550/ http://psasir.upm.edu.my/id/eprint/34550/ http://psasir.upm.edu.my/id/eprint/34550/ |