Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source
The current study investigates the 2D entropy production and the mixed convection inside a wavy-walled chamber containing a rotating cylinder and a heat source. The heat source of finite-length h is placed in the middle of the left vertical surface in which its temperature is fixed at T. The tempera...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI
2020
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| Online Access: | http://eprints.uthm.edu.my/6309/1/AJ%202020%20%28269%29.pdf |
| _version_ | 1825710166399516672 |
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| author | Alsabery, Ammar I. Tayebi, Tahar Roslan, Rozaini Chamkha, Ali J. Hashim, Ishak |
| author_facet | Alsabery, Ammar I. Tayebi, Tahar Roslan, Rozaini Chamkha, Ali J. Hashim, Ishak |
| author_sort | Alsabery, Ammar I. |
| collection | UTHM |
| description | The current study investigates the 2D entropy production and the mixed convection inside a wavy-walled chamber containing a rotating cylinder and a heat source. The heat source of finite-length h is placed in the middle of the left vertical surface in which its temperature is fixed at T. The temperature of the right vertical surface, however, is maintained at lower temperature Tc. The remaining parts of the left surface and the wavy horizontal surfaces are perfectly insulated. The governing equations and the complex boundary conditions are non-dimensionalized and solved using the weighted residual finite element method, in particular, the Galerkin method. Various active parameters are considered, i.e., Rayleigh number Ra = 103 and 105, number of oscillations: 1 ≤ N ≤ 4, angular rotational velocity: -1000 ≤ Ω ≤ 1000, and heat source length: 0.2 ≤ H ≤ 0.8. A mesh independence test is carried out and the result is validated against the benchmark solution. Results such as stream function, isotherms and entropy lines are plotted and we found that fluid flow can be controlled by manipulating the rotating velocity of the circular cylinder. For all the considered oscillation numbers, the Bejan number is the highest for the case involving a nearly stationary inner cylinder. |
| first_indexed | 2024-03-05T21:53:29Z |
| format | Article |
| id | uthm.eprints-6309 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | English |
| last_indexed | 2024-03-05T21:53:29Z |
| publishDate | 2020 |
| publisher | MDPI |
| record_format | dspace |
| spelling | uthm.eprints-63092022-01-30T02:02:49Z http://eprints.uthm.edu.my/6309/ Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source Alsabery, Ammar I. Tayebi, Tahar Roslan, Rozaini Chamkha, Ali J. Hashim, Ishak T Technology (General) TJ255-265 Heat engines The current study investigates the 2D entropy production and the mixed convection inside a wavy-walled chamber containing a rotating cylinder and a heat source. The heat source of finite-length h is placed in the middle of the left vertical surface in which its temperature is fixed at T. The temperature of the right vertical surface, however, is maintained at lower temperature Tc. The remaining parts of the left surface and the wavy horizontal surfaces are perfectly insulated. The governing equations and the complex boundary conditions are non-dimensionalized and solved using the weighted residual finite element method, in particular, the Galerkin method. Various active parameters are considered, i.e., Rayleigh number Ra = 103 and 105, number of oscillations: 1 ≤ N ≤ 4, angular rotational velocity: -1000 ≤ Ω ≤ 1000, and heat source length: 0.2 ≤ H ≤ 0.8. A mesh independence test is carried out and the result is validated against the benchmark solution. Results such as stream function, isotherms and entropy lines are plotted and we found that fluid flow can be controlled by manipulating the rotating velocity of the circular cylinder. For all the considered oscillation numbers, the Bejan number is the highest for the case involving a nearly stationary inner cylinder. MDPI 2020 Article PeerReviewed text en http://eprints.uthm.edu.my/6309/1/AJ%202020%20%28269%29.pdf Alsabery, Ammar I. and Tayebi, Tahar and Roslan, Rozaini and Chamkha, Ali J. and Hashim, Ishak (2020) Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source. Entropy, 22 (6). pp. 1-20. ISSN 1099-4300 https://doi.org/10.3390/e22060606 |
| spellingShingle | T Technology (General) TJ255-265 Heat engines Alsabery, Ammar I. Tayebi, Tahar Roslan, Rozaini Chamkha, Ali J. Hashim, Ishak Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title | Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title_full | Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title_fullStr | Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title_full_unstemmed | Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title_short | Entropy generation and mixed convection flow inside a wavy-walled enclosure containing a rotating solid cylinder and a heat source |
| title_sort | entropy generation and mixed convection flow inside a wavy walled enclosure containing a rotating solid cylinder and a heat source |
| topic | T Technology (General) TJ255-265 Heat engines |
| url | http://eprints.uthm.edu.my/6309/1/AJ%202020%20%28269%29.pdf |
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