Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion
The onset of convection induced by transient mass diffusion in a stationary gas was succesfully predicted with transient instability theory and simulated using a computational fluid dynamics (CFD) scheme. 2D time-dependent simulations were conducted for bottom-up diffusion of a light gas in a stagna...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/15939/ http://psasir.upm.edu.my/id/eprint/15939/1/Onset%20of%20natural%20convection%20in%20gas.pdf |
| _version_ | 1848842820327047168 |
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| author | Tan, Ka Kheng Tey, Beng Ti Tan, Yee Wan |
| author_facet | Tan, Ka Kheng Tey, Beng Ti Tan, Yee Wan |
| author_sort | Tan, Ka Kheng |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The onset of convection induced by transient mass diffusion in a stationary gas was succesfully predicted with transient instability theory and simulated using a computational fluid dynamics (CFD) scheme. 2D time-dependent simulations were conducted for bottom-up diffusion of a light gas in a stagnant heavy gas. The results of simulations were used to calculate the transient Rayleigh number adopted from the theory of Tan and Thorpe (1996 and 1999). The average transient maximum Rayleigh number from simulations is 707, which is close to the theoretical value of 817 for analogous bottom heating with constant heat flux. The simulated critical times of the onset of convection were in reasonably good agreement with the predicted values from theory. |
| first_indexed | 2025-11-15T08:05:12Z |
| format | Article |
| id | upm-15939 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:05:12Z |
| publishDate | 2010 |
| publisher | Taylor & Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-159392016-11-30T03:34:03Z http://psasir.upm.edu.my/id/eprint/15939/ Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion Tan, Ka Kheng Tey, Beng Ti Tan, Yee Wan The onset of convection induced by transient mass diffusion in a stationary gas was succesfully predicted with transient instability theory and simulated using a computational fluid dynamics (CFD) scheme. 2D time-dependent simulations were conducted for bottom-up diffusion of a light gas in a stagnant heavy gas. The results of simulations were used to calculate the transient Rayleigh number adopted from the theory of Tan and Thorpe (1996 and 1999). The average transient maximum Rayleigh number from simulations is 707, which is close to the theoretical value of 817 for analogous bottom heating with constant heat flux. The simulated critical times of the onset of convection were in reasonably good agreement with the predicted values from theory. Taylor & Francis 2010-05-26 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15939/1/Onset%20of%20natural%20convection%20in%20gas.pdf Tan, Ka Kheng and Tey, Beng Ti and Tan, Yee Wan (2010) Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion. Engineering Applications of Computational Fluid Mechanics, 4 (4). pp. 475-482. ISSN 1994-2060; ESSN: 1997-003X http://www.tandfonline.com/doi/abs/10.1080/19942060.2010.11015334 10.1080/19942060.2010.11015334 |
| spellingShingle | Tan, Ka Kheng Tey, Beng Ti Tan, Yee Wan Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title | Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title_full | Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title_fullStr | Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title_full_unstemmed | Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title_short | Onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| title_sort | onset of natural convection in gas-gas system induced by bottom-up transient mass diffusion |
| url | http://psasir.upm.edu.my/id/eprint/15939/ http://psasir.upm.edu.my/id/eprint/15939/ http://psasir.upm.edu.my/id/eprint/15939/ http://psasir.upm.edu.my/id/eprint/15939/1/Onset%20of%20natural%20convection%20in%20gas.pdf |