A unified wall function for wall condensation modelling in containment multi-component flows
| Autor: | Wanai Li, Tian Chen, Dorothee Senechal, Jiesheng Min, Chunyu Zhang, Stephane Mimouni |
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| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
020209 energy Mechanical Engineering Condensation Boundary (topology) 02 engineering and technology Function (mathematics) Mechanics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Boundary layer Complex geometry Nuclear Energy and Engineering Flow (mathematics) Combined forced and natural convection Mass transfer 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Safety Risk Reliability and Quality Waste Management and Disposal Geology |
| Zdroj: | Nuclear Engineering and Design. 348:24-36 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2019.04.012 |
| Popis: | One of the major difficulties in modelling the steam condensation in the containment under accidental scenarios arises from the complicated flow patterns. Although empirical correlations have been established to predict the heat and the mass transfer on the wall surfaces, it is difficult to apply the relations to real containments for the different flow patterns within the multiple compartments and the difficulty in defining the non-dimensional numbers under complex geometry. The application of the resolved boundary method is also limited since it requires very fine grids inside the boundary layer. This paper proposes a unified wall function method to calculate the heat and the mass transfer on the wall surfaces under mixed convection flows. A series of benchmark tests are used to validate the proposed method and it is shown the method is applicable to a wide range of flow regimes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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