Energy Separation Mechanism in Unconfined Laminar Compressible Vortex
A theoretical investigation from the view point of gas-dynamics and thermodynamics was carried out, in order to clarify the energy separation mechanism in an unconfined laminar compressible vortex, as a primary flow element of a vortex tube. The mathematical solutions of density and temperature in a...
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| Format: | Article |
| Language: | English |
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ELSEVIER
2015
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| Online Access: | http://umpir.ump.edu.my/id/eprint/11718/ http://umpir.ump.edu.my/id/eprint/11718/1/Energy%20Separation%20Mechanism%20in%20Unconfined%20Laminar%20Compressible%20Vortex.pdf |
| _version_ | 1848819067133100032 |
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| author | Katanoda, Hiroshi Mohd Hazwan, Yusof Morita, Hiromitsu |
| author_facet | Katanoda, Hiroshi Mohd Hazwan, Yusof Morita, Hiromitsu |
| author_sort | Katanoda, Hiroshi |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | A theoretical investigation from the view point of gas-dynamics and thermodynamics was carried out, in order to clarify the energy separation mechanism in an unconfined laminar compressible vortex, as a primary flow element of a vortex tube. The mathematical solutions of density and temperature in a viscous compressible vortical flow, with tangential velocity, were examined using an evaluation equation of total temperature. It is found from the results that a hotter gas in the peripheral region of the vortex is mainly generated by heat caused by viscous dissipation. A colder gas in the vortex center is mainly generated by viscous shear work done by the fluid element onto the surface of the surrounding gas. In addition, it is also found that the larger the representative Mach number of a vortex is, the lower the total temperature at the center of the vortex is, and at the same time, the
higher the maximum total temperature in the peripheral region is. The increase in specific heat ratio of the working gas has the same effect, as increasing the representative Mach number of the vortex, on the total temperature in the vortex. |
| first_indexed | 2025-11-15T01:47:39Z |
| format | Article |
| id | ump-11718 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:47:39Z |
| publishDate | 2015 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-117182018-01-19T00:55:19Z http://umpir.ump.edu.my/id/eprint/11718/ Energy Separation Mechanism in Unconfined Laminar Compressible Vortex Katanoda, Hiroshi Mohd Hazwan, Yusof Morita, Hiromitsu TJ Mechanical engineering and machinery A theoretical investigation from the view point of gas-dynamics and thermodynamics was carried out, in order to clarify the energy separation mechanism in an unconfined laminar compressible vortex, as a primary flow element of a vortex tube. The mathematical solutions of density and temperature in a viscous compressible vortical flow, with tangential velocity, were examined using an evaluation equation of total temperature. It is found from the results that a hotter gas in the peripheral region of the vortex is mainly generated by heat caused by viscous dissipation. A colder gas in the vortex center is mainly generated by viscous shear work done by the fluid element onto the surface of the surrounding gas. In addition, it is also found that the larger the representative Mach number of a vortex is, the lower the total temperature at the center of the vortex is, and at the same time, the higher the maximum total temperature in the peripheral region is. The increase in specific heat ratio of the working gas has the same effect, as increasing the representative Mach number of the vortex, on the total temperature in the vortex. ELSEVIER 2015-07-06 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/11718/1/Energy%20Separation%20Mechanism%20in%20Unconfined%20Laminar%20Compressible%20Vortex.pdf Katanoda, Hiroshi and Mohd Hazwan, Yusof and Morita, Hiromitsu (2015) Energy Separation Mechanism in Unconfined Laminar Compressible Vortex. International Journal of Refrigeration, 59. pp. 115-123. ISSN 0140-7007. (Published) http://dx.doi.org/10.1016/j.ijrefrig.2015.07.008 DOI: 10.1016/j.ijrefrig.2015.07.008 |
| spellingShingle | TJ Mechanical engineering and machinery Katanoda, Hiroshi Mohd Hazwan, Yusof Morita, Hiromitsu Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title | Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title_full | Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title_fullStr | Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title_full_unstemmed | Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title_short | Energy Separation Mechanism in Unconfined Laminar Compressible Vortex |
| title_sort | energy separation mechanism in unconfined laminar compressible vortex |
| topic | TJ Mechanical engineering and machinery |
| url | http://umpir.ump.edu.my/id/eprint/11718/ http://umpir.ump.edu.my/id/eprint/11718/ http://umpir.ump.edu.my/id/eprint/11718/ http://umpir.ump.edu.my/id/eprint/11718/1/Energy%20Separation%20Mechanism%20in%20Unconfined%20Laminar%20Compressible%20Vortex.pdf |