Axisymmetric Numerical Investigation on Steam Bubble Condensation
In order to obtain a high-accuracy and adaptable condensation phase change model, this paper selects the Nusselt number correlation formula that Kim proposed based on the experimental data and adjusts the Nusselt number in the bubble condensation process by calculating the phase change coefficient o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/19/3757 |
| _version_ | 1811263628627673088 |
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| author | Haibo Li Maocheng Tian Liangliang Tang |
| author_facet | Haibo Li Maocheng Tian Liangliang Tang |
| author_sort | Haibo Li |
| collection | DOAJ |
| description | In order to obtain a high-accuracy and adaptable condensation phase change model, this paper selects the Nusselt number correlation formula that Kim proposed based on the experimental data and adjusts the Nusselt number in the bubble condensation process by calculating the phase change coefficient of the Lee model in the UDF. Through the simulation and fine-tuning of the 12 groups of operating conditions, the formula for the change of the phase change coefficient of the Lee model during the bubble condensation process is obtained. The accuracy and wide applicability of the variation formula are verified by comparison with various types of experimental data. The Lee model provides a certain reference for the numerical simulation of the bubble condensation process. The numerical simulation of the condensation process of vapor bubbles is carried out by using the formula of the phase change coefficient. The error between the simulation result of the bubble volume change and the experimental result is lower than ±15%, which basically verified the reliability of the numerical model adopted in this study. The bubble condensation process has been analyzed under various operating conditions. The simulation results show that when the bubble rises, disturbance occurs with the fluid and several tiny eddies are generated on the side of the bubble. Micro-circulation of the vapor inside the bubble accelerates the heat and mass transfer rate at the gas−liquid interface. When condensation occurs, the mass transfer rate at the interface is different and the pressure inside the bubble is higher than that around it. |
| first_indexed | 2024-04-12T19:48:54Z |
| format | Article |
| id | doaj.art-7f082e5c6c0844c3bdfb7e0c7d8147b5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-12T19:48:54Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7f082e5c6c0844c3bdfb7e0c7d8147b52022-12-22T03:18:53ZengMDPI AGEnergies1996-10732019-09-011219375710.3390/en12193757en12193757Axisymmetric Numerical Investigation on Steam Bubble CondensationHaibo Li0Maocheng Tian1Liangliang Tang2School of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaGeneral Machinery Research Institute, Hefei 230000, ChinaIn order to obtain a high-accuracy and adaptable condensation phase change model, this paper selects the Nusselt number correlation formula that Kim proposed based on the experimental data and adjusts the Nusselt number in the bubble condensation process by calculating the phase change coefficient of the Lee model in the UDF. Through the simulation and fine-tuning of the 12 groups of operating conditions, the formula for the change of the phase change coefficient of the Lee model during the bubble condensation process is obtained. The accuracy and wide applicability of the variation formula are verified by comparison with various types of experimental data. The Lee model provides a certain reference for the numerical simulation of the bubble condensation process. The numerical simulation of the condensation process of vapor bubbles is carried out by using the formula of the phase change coefficient. The error between the simulation result of the bubble volume change and the experimental result is lower than ±15%, which basically verified the reliability of the numerical model adopted in this study. The bubble condensation process has been analyzed under various operating conditions. The simulation results show that when the bubble rises, disturbance occurs with the fluid and several tiny eddies are generated on the side of the bubble. Micro-circulation of the vapor inside the bubble accelerates the heat and mass transfer rate at the gas−liquid interface. When condensation occurs, the mass transfer rate at the interface is different and the pressure inside the bubble is higher than that around it.https://www.mdpi.com/1996-1073/12/19/3757bubble condensationmodified lee modelcfdmultiphase flow |
| spellingShingle | Haibo Li Maocheng Tian Liangliang Tang Axisymmetric Numerical Investigation on Steam Bubble Condensation Energies bubble condensation modified lee model cfd multiphase flow |
| title | Axisymmetric Numerical Investigation on Steam Bubble Condensation |
| title_full | Axisymmetric Numerical Investigation on Steam Bubble Condensation |
| title_fullStr | Axisymmetric Numerical Investigation on Steam Bubble Condensation |
| title_full_unstemmed | Axisymmetric Numerical Investigation on Steam Bubble Condensation |
| title_short | Axisymmetric Numerical Investigation on Steam Bubble Condensation |
| title_sort | axisymmetric numerical investigation on steam bubble condensation |
| topic | bubble condensation modified lee model cfd multiphase flow |
| url | https://www.mdpi.com/1996-1073/12/19/3757 |
| work_keys_str_mv | AT haiboli axisymmetricnumericalinvestigationonsteambubblecondensation AT maochengtian axisymmetricnumericalinvestigationonsteambubblecondensation AT liangliangtang axisymmetricnumericalinvestigationonsteambubblecondensation |