Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator
Abstract This study investigates free convective within an octagonal cavity, which is partitioned into two compartments by a flexible separator. One of the left walls is maintained at a high temperature, while a lower temperature is applied to one of the right walls. The position of these active wal...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-88852-1 |
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| author | Mohamed Boujelbene Awatef Abidi S. A. M. Mehryan Sultan Alshehery Ahmad Hajjar Nehad Ali Shah Ibrahim Mahariq Nidhal Ben Khedher |
| author_facet | Mohamed Boujelbene Awatef Abidi S. A. M. Mehryan Sultan Alshehery Ahmad Hajjar Nehad Ali Shah Ibrahim Mahariq Nidhal Ben Khedher |
| author_sort | Mohamed Boujelbene |
| collection | DOAJ |
| description | Abstract This study investigates free convective within an octagonal cavity, which is partitioned into two compartments by a flexible separator. One of the left walls is maintained at a high temperature, while a lower temperature is applied to one of the right walls. The position of these active walls is adjustable, and the separator can be oriented vertically or inclined with either a positive or negative slope. The deformation of the flexible separator is modeled using the Arbitrary Lagrangian–Eulerian method. The outcomes indicate that locating the hotter wall near the top and moving the colder wall downwards hinders free convection and reduces the stress in the separator. Moreover, upward movement of both active walls leads to a decrease in the average temperature. An inclined separator with a positive slope enhances the heat transfer rate and experiences the lowest stress levels compared to vertical and negatively sloped separators. Raising Rayleigh number enhances the flow intensity and the stress in the flexible separator. Furthermore, it is found that a decrease in the elasticity modules of the separator from 1014 to 5 × 1011 results in a 5% increase in the average Nusselt number. |
| format | Article |
| id | doaj-art-849d7fb9248b41a5b57730272bb0531f |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-849d7fb9248b41a5b57730272bb0531f2025-02-09T12:36:46ZengNature PortfolioScientific Reports2045-23222025-02-0115112710.1038/s41598-025-88852-1Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separatorMohamed Boujelbene0Awatef Abidi1S. A. M. Mehryan2Sultan Alshehery3Ahmad Hajjar4Nehad Ali Shah5Ibrahim Mahariq6Nidhal Ben Khedher7Industrial Engineering Department, College of Engineering, University of Ha’ilPhysics Department, College of Sciences Abha, King Khalid UniversityDepartment of Mechanical and Energy Engineering, Shahid Beheshti University, A.C.Mechanical Engineering Department, College of Engineering, King Khalid UniversityCenter for Environmental Intelligence and College of Engineering and Computer Science, VinUniversityDepartment of Mechanical Engineering, Sejong UniversityGUST Engineering and Applied Innovation Research Center (GEAR), Gulf University for Science and TechnologyDepartment of Mechanical Engineering, College of Engineering, University of Ha’ilAbstract This study investigates free convective within an octagonal cavity, which is partitioned into two compartments by a flexible separator. One of the left walls is maintained at a high temperature, while a lower temperature is applied to one of the right walls. The position of these active walls is adjustable, and the separator can be oriented vertically or inclined with either a positive or negative slope. The deformation of the flexible separator is modeled using the Arbitrary Lagrangian–Eulerian method. The outcomes indicate that locating the hotter wall near the top and moving the colder wall downwards hinders free convection and reduces the stress in the separator. Moreover, upward movement of both active walls leads to a decrease in the average temperature. An inclined separator with a positive slope enhances the heat transfer rate and experiences the lowest stress levels compared to vertical and negatively sloped separators. Raising Rayleigh number enhances the flow intensity and the stress in the flexible separator. Furthermore, it is found that a decrease in the elasticity modules of the separator from 1014 to 5 × 1011 results in a 5% increase in the average Nusselt number.https://doi.org/10.1038/s41598-025-88852-1Flexible separatorNatural convectionArbitrary Lagrangian–Eulerian methodLocation of active walls |
| spellingShingle | Mohamed Boujelbene Awatef Abidi S. A. M. Mehryan Sultan Alshehery Ahmad Hajjar Nehad Ali Shah Ibrahim Mahariq Nidhal Ben Khedher Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator Scientific Reports Flexible separator Natural convection Arbitrary Lagrangian–Eulerian method Location of active walls |
| title | Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| title_full | Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| title_fullStr | Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| title_full_unstemmed | Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| title_short | Thermo-mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| title_sort | thermo mechanical analysis of free convection in an octagonal cavity with adjustable active walls and flexible separator |
| topic | Flexible separator Natural convection Arbitrary Lagrangian–Eulerian method Location of active walls |
| url | https://doi.org/10.1038/s41598-025-88852-1 |
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