Flow regime transition criteria for vertical downward two-phase flow in rectangular channel
Narrow rectangular channels are employed in nuclear research reactors that use plate-type nuclear fuels, high heat-flux compact heat exchangers, and high-performance micro-electronics cooling systems. Two-phase flow in narrow rectangular channels is important, and it needs to be better understood be...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573321005027 |
| _version_ | 1819290649276448768 |
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| author | Vikrant Siddharudh Chalgeri Ji Hwan Jeong |
| author_facet | Vikrant Siddharudh Chalgeri Ji Hwan Jeong |
| author_sort | Vikrant Siddharudh Chalgeri |
| collection | DOAJ |
| description | Narrow rectangular channels are employed in nuclear research reactors that use plate-type nuclear fuels, high heat-flux compact heat exchangers, and high-performance micro-electronics cooling systems. Two-phase flow in narrow rectangular channels is important, and it needs to be better understood because it is considerably different than that in round tubes. In this study, mechanistic models were developed for the flow regime transition criteria for various flow regimes in co-current air-water two-phase flow for vertical downward flow inside a narrow rectangular channel. The newly developed criteria were compared to a flow regime map of downward air-water two-phase flow inside a narrow rectangular channel with a 2.35-mm gap width under ambient temperature and pressure conditions. Overall, the proposed model showed good agreement with the experimental data. |
| first_indexed | 2024-12-24T03:26:06Z |
| format | Article |
| id | doaj.art-58ad0a16c07b46448554856ccff41d8d |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-24T03:26:06Z |
| publishDate | 2022-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-58ad0a16c07b46448554856ccff41d8d2022-12-21T17:17:20ZengElsevierNuclear Engineering and Technology1738-57332022-02-01542546553Flow regime transition criteria for vertical downward two-phase flow in rectangular channelVikrant Siddharudh Chalgeri0Ji Hwan Jeong1School of Mechanical Engineering, Pusan National University, Busan, 46241, South KoreaCorresponding author.; School of Mechanical Engineering, Pusan National University, Busan, 46241, South KoreaNarrow rectangular channels are employed in nuclear research reactors that use plate-type nuclear fuels, high heat-flux compact heat exchangers, and high-performance micro-electronics cooling systems. Two-phase flow in narrow rectangular channels is important, and it needs to be better understood because it is considerably different than that in round tubes. In this study, mechanistic models were developed for the flow regime transition criteria for various flow regimes in co-current air-water two-phase flow for vertical downward flow inside a narrow rectangular channel. The newly developed criteria were compared to a flow regime map of downward air-water two-phase flow inside a narrow rectangular channel with a 2.35-mm gap width under ambient temperature and pressure conditions. Overall, the proposed model showed good agreement with the experimental data.http://www.sciencedirect.com/science/article/pii/S1738573321005027Flow regimeVertical downward flowNarrow rectangular channelDrift-flux modelTransition criteria |
| spellingShingle | Vikrant Siddharudh Chalgeri Ji Hwan Jeong Flow regime transition criteria for vertical downward two-phase flow in rectangular channel Nuclear Engineering and Technology Flow regime Vertical downward flow Narrow rectangular channel Drift-flux model Transition criteria |
| title | Flow regime transition criteria for vertical downward two-phase flow in rectangular channel |
| title_full | Flow regime transition criteria for vertical downward two-phase flow in rectangular channel |
| title_fullStr | Flow regime transition criteria for vertical downward two-phase flow in rectangular channel |
| title_full_unstemmed | Flow regime transition criteria for vertical downward two-phase flow in rectangular channel |
| title_short | Flow regime transition criteria for vertical downward two-phase flow in rectangular channel |
| title_sort | flow regime transition criteria for vertical downward two phase flow in rectangular channel |
| topic | Flow regime Vertical downward flow Narrow rectangular channel Drift-flux model Transition criteria |
| url | http://www.sciencedirect.com/science/article/pii/S1738573321005027 |
| work_keys_str_mv | AT vikrantsiddharudhchalgeri flowregimetransitioncriteriaforverticaldownwardtwophaseflowinrectangularchannel AT jihwanjeong flowregimetransitioncriteriaforverticaldownwardtwophaseflowinrectangularchannel |