CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach
The present work is focused on the condensation heat transfer that plays a dominant role in many accident scenarios postulated to occur in the containment of nuclear reactors. The study compares a general multiphase approach implemented in NEPTUNE_CFD with a homogeneous model, of widespread use for...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2011/941239 |
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| author | S. Mimouni N. Mechitoua A. Foissac M. Hassanaly M. Ouraou |
| author_facet | S. Mimouni N. Mechitoua A. Foissac M. Hassanaly M. Ouraou |
| author_sort | S. Mimouni |
| collection | DOAJ |
| description | The present work is focused on the condensation heat transfer that plays a dominant role in many accident scenarios postulated to occur in the containment of nuclear reactors. The study compares a general multiphase approach implemented in NEPTUNE_CFD with a homogeneous model, of widespread use for engineering studies, implemented in Code_Saturne. The model implemented in NEPTUNE_CFD assumes that liquid droplets form along the wall within nucleation sites. Vapor condensation on droplets makes them grow. Once the droplet diameter reaches a critical value, gravitational forces compensate surface tension force and then droplets slide over the wall and form a liquid film. This approach allows taking into account simultaneously the mechanical drift between the droplet and the gas, the heat and mass transfer on droplets in the core of the flow and the condensation/evaporation phenomena on the walls. As concern the homogeneous approach, the motion of the liquid film due to the gravitational forces is neglected, as well as the volume occupied by the liquid. Both condensation models and compressible procedures are validated and compared to experimental data provided by the TOSQAN ISP47 experiment (IRSN Saclay). Computational results compare favorably with experimental data, particularly for the Helium and steam volume fractions. |
| format | Article |
| id | doaj-art-a2d6e84c16b64a09a0799c5cbd5f1a9a |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-a2d6e84c16b64a09a0799c5cbd5f1a9a2025-02-03T01:20:54ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832011-01-01201110.1155/2011/941239941239CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow ApproachS. Mimouni0N. Mechitoua1A. Foissac2M. Hassanaly3M. Ouraou4Electricité de France R&D Division, 6 Quai Watier, 78400 Chatou Cedex, FranceElectricité de France R&D Division, 6 Quai Watier, 78400 Chatou Cedex, FranceElectricité de France R&D Division, 6 Quai Watier, 78400 Chatou Cedex, FranceINCKA, 85, Avenue Pierre Grenier, 92100 Boulogne Billancourt, FranceINCKA, 85, Avenue Pierre Grenier, 92100 Boulogne Billancourt, FranceThe present work is focused on the condensation heat transfer that plays a dominant role in many accident scenarios postulated to occur in the containment of nuclear reactors. The study compares a general multiphase approach implemented in NEPTUNE_CFD with a homogeneous model, of widespread use for engineering studies, implemented in Code_Saturne. The model implemented in NEPTUNE_CFD assumes that liquid droplets form along the wall within nucleation sites. Vapor condensation on droplets makes them grow. Once the droplet diameter reaches a critical value, gravitational forces compensate surface tension force and then droplets slide over the wall and form a liquid film. This approach allows taking into account simultaneously the mechanical drift between the droplet and the gas, the heat and mass transfer on droplets in the core of the flow and the condensation/evaporation phenomena on the walls. As concern the homogeneous approach, the motion of the liquid film due to the gravitational forces is neglected, as well as the volume occupied by the liquid. Both condensation models and compressible procedures are validated and compared to experimental data provided by the TOSQAN ISP47 experiment (IRSN Saclay). Computational results compare favorably with experimental data, particularly for the Helium and steam volume fractions.http://dx.doi.org/10.1155/2011/941239 |
| spellingShingle | S. Mimouni N. Mechitoua A. Foissac M. Hassanaly M. Ouraou CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach Science and Technology of Nuclear Installations |
| title | CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach |
| title_full | CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach |
| title_fullStr | CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach |
| title_full_unstemmed | CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach |
| title_short | CFD Modeling of Wall Steam Condensation: Two-Phase Flow Approach versus Homogeneous Flow Approach |
| title_sort | cfd modeling of wall steam condensation two phase flow approach versus homogeneous flow approach |
| url | http://dx.doi.org/10.1155/2011/941239 |
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