Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water
The Effective Heat Source (EHS) and Effective Momentum Source (EMS) models have been proposed to predict the development of thermal stratification and mixing during a steam injection into a large pool of water. These effective models are implemented in GOTHIC software and validated against the POOLE...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2014/752597 |
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| _version_ | 1832561818214596608 |
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| author | Hua Li Walter Villanueva Markku Puustinen Jani Laine Pavel Kudinov |
| author_facet | Hua Li Walter Villanueva Markku Puustinen Jani Laine Pavel Kudinov |
| author_sort | Hua Li |
| collection | DOAJ |
| description | The Effective Heat Source (EHS) and Effective Momentum Source (EMS) models have been proposed to predict the development of thermal stratification and mixing during a steam injection into a large pool of water. These effective models are implemented in GOTHIC software and validated against the POOLEX STB-20 and STB-21 tests and the PPOOLEX MIX-01 test. First, the EHS model is validated against STB-20 test which shows the development of thermal stratification. Different numerical schemes and grid resolutions have been tested. A 48×114 grid with second order scheme is sufficient to capture the vertical temperature distribution in the pool. Next, the EHS and EMS models are validated against STB-21 test. Effective momentum is estimated based on the water level oscillations in the blowdown pipe. An effective momentum selected within the experimental measurement uncertainty can reproduce the mixing details. Finally, the EHS-EMS models are validated against MIX-01 test which has improved space and time resolution of temperature measurements inside the blowdown pipe. Excellent agreement in averaged pool temperature and water level in the pool between the experiment and simulation has been achieved. The development of thermal stratification in the pool is also well captured in the simulation as well as the thermal behavior of the pool during the mixing phase. |
| format | Article |
| id | doaj-art-0cd80728bd624972b443b4a7fae44bdd |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-0cd80728bd624972b443b4a7fae44bdd2025-02-03T01:23:59ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832014-01-01201410.1155/2014/752597752597Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of WaterHua Li0Walter Villanueva1Markku Puustinen2Jani Laine3Pavel Kudinov4Division of Nuclear Power Safety, Royal Institute of Technology (KTH), Roslagstullsbacken 21, 10691 Stockholm, SwedenDivision of Nuclear Power Safety, Royal Institute of Technology (KTH), Roslagstullsbacken 21, 10691 Stockholm, SwedenNuclear Safety Research Unit, Lappeenranta University of Technology (LUT), 53851 Lappeenranta, FinlandNuclear Safety Research Unit, Lappeenranta University of Technology (LUT), 53851 Lappeenranta, FinlandDivision of Nuclear Power Safety, Royal Institute of Technology (KTH), Roslagstullsbacken 21, 10691 Stockholm, SwedenThe Effective Heat Source (EHS) and Effective Momentum Source (EMS) models have been proposed to predict the development of thermal stratification and mixing during a steam injection into a large pool of water. These effective models are implemented in GOTHIC software and validated against the POOLEX STB-20 and STB-21 tests and the PPOOLEX MIX-01 test. First, the EHS model is validated against STB-20 test which shows the development of thermal stratification. Different numerical schemes and grid resolutions have been tested. A 48×114 grid with second order scheme is sufficient to capture the vertical temperature distribution in the pool. Next, the EHS and EMS models are validated against STB-21 test. Effective momentum is estimated based on the water level oscillations in the blowdown pipe. An effective momentum selected within the experimental measurement uncertainty can reproduce the mixing details. Finally, the EHS-EMS models are validated against MIX-01 test which has improved space and time resolution of temperature measurements inside the blowdown pipe. Excellent agreement in averaged pool temperature and water level in the pool between the experiment and simulation has been achieved. The development of thermal stratification in the pool is also well captured in the simulation as well as the thermal behavior of the pool during the mixing phase.http://dx.doi.org/10.1155/2014/752597 |
| spellingShingle | Hua Li Walter Villanueva Markku Puustinen Jani Laine Pavel Kudinov Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water Science and Technology of Nuclear Installations |
| title | Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water |
| title_full | Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water |
| title_fullStr | Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water |
| title_full_unstemmed | Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water |
| title_short | Validation of Effective Models for Simulation of Thermal Stratification and Mixing Induced by Steam Injection into a Large Pool of Water |
| title_sort | validation of effective models for simulation of thermal stratification and mixing induced by steam injection into a large pool of water |
| url | http://dx.doi.org/10.1155/2014/752597 |
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