Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container
Understanding the reversal process of the large-scale circulation will facilitate system recognition of turbulent penetrative Rayleigh-Bénard convection. The present work describes experimental and numerical investigations on the Rayleigh-Bénard flow of water near 4 °C in a box-shaped container. The...
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| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016253 |
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| author | Xiao-Jie Huang Guang-Yong Gao You-Rong Li |
| author_facet | Xiao-Jie Huang Guang-Yong Gao You-Rong Li |
| author_sort | Xiao-Jie Huang |
| collection | DOAJ |
| description | Understanding the reversal process of the large-scale circulation will facilitate system recognition of turbulent penetrative Rayleigh-Bénard convection. The present work describes experimental and numerical investigations on the Rayleigh-Bénard flow of water near 4 °C in a box-shaped container. The results indicate that the revised Nusselt number is slightly higher than average Nusselt number with adiabatic assumption. The Nusselt numbers from the simulations show good agreement with the experiment values. Large-scale circulation reversal becomes less likely with the increasing Rayleigh number and density inversion parameter. Reversal is not observed at large density inversion parameters and Rayleigh numbers. Large vertical velocity and temperature fluctuations at the center point are found during the reversal process. However, the Nusselt number is slightly affected by the occurrence of the reversal. |
| format | Article |
| id | doaj-art-452ee947ea3e4571bd823c6ea8f667fa |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-452ee947ea3e4571bd823c6ea8f667fa2025-01-08T04:52:36ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105594Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped containerXiao-Jie Huang0Guang-Yong Gao1You-Rong Li2SWS Hemodialysis Care Co., Ltd, Chongqing, 401121, China; School of Primary Education, Chongqing Normal University, Chongqing, 400047, ChinaSWS Hemodialysis Care Co., Ltd, Chongqing, 401121, ChinaSchool of Energy and Power Engineering, Chongqing University, Chongqing, 400044, China; Corresponding author.Understanding the reversal process of the large-scale circulation will facilitate system recognition of turbulent penetrative Rayleigh-Bénard convection. The present work describes experimental and numerical investigations on the Rayleigh-Bénard flow of water near 4 °C in a box-shaped container. The results indicate that the revised Nusselt number is slightly higher than average Nusselt number with adiabatic assumption. The Nusselt numbers from the simulations show good agreement with the experiment values. Large-scale circulation reversal becomes less likely with the increasing Rayleigh number and density inversion parameter. Reversal is not observed at large density inversion parameters and Rayleigh numbers. Large vertical velocity and temperature fluctuations at the center point are found during the reversal process. However, the Nusselt number is slightly affected by the occurrence of the reversal.http://www.sciencedirect.com/science/article/pii/S2214157X24016253Rayleigh-Bénard flowTurbulent penetrative convectionCold waterLarge-scale circulationReversals |
| spellingShingle | Xiao-Jie Huang Guang-Yong Gao You-Rong Li Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container Case Studies in Thermal Engineering Rayleigh-Bénard flow Turbulent penetrative convection Cold water Large-scale circulation Reversals |
| title | Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container |
| title_full | Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container |
| title_fullStr | Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container |
| title_full_unstemmed | Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container |
| title_short | Experimental and numerical study of turbulent penetrative Rayleigh-Bénard flow of water near 4 °C in a box-shaped container |
| title_sort | experimental and numerical study of turbulent penetrative rayleigh benard flow of water near 4 °c in a box shaped container |
| topic | Rayleigh-Bénard flow Turbulent penetrative convection Cold water Large-scale circulation Reversals |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016253 |
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