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Possibilities and Limitations of CFD Simulation for Flashing Flow Scenarios in Nuclear Applications

Author

Listed:
  • Yixiang Liao

    (Gesellschaft für Anlagen-und Reaktorsicherheit, Boltzmannstraße 14, 85748 Garching bei München, Germany
    Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany)

  • Dirk Lucas

    (Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany)

Abstract

The flashing phenomenon is relevant to nuclear safety analysis, for example by a loss of coolant accident and safety release scenarios. It has been studied intensively by means of experiments and simulations with system codes, but computational fluid dynamics (CFD) simulation is still at the embryonic stage. Rapid increasing computer speed makes it possible to apply the CFD technology in such complex flow situations. Nevertheless, a thorough evaluation on the limitations and restrictions is still missing, which is however indispensable for reliable application, as well as further development. In the present work, the commonly-used two-fluid model with different mono-disperse assumptions is used to simulate various flashing scenarios. With the help of available experimental data, the results are evaluated, and the limitations are discussed. A poly-disperse method is found necessary for a reliable prediction of mean bubble size and phase distribution. The first attempts to trace the evolution of the bubble size distribution by means of poly-disperse simulations are made.

Suggested Citation

  • Yixiang Liao & Dirk Lucas, 2017. "Possibilities and Limitations of CFD Simulation for Flashing Flow Scenarios in Nuclear Applications," Energies, MDPI, vol. 10(1), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:1:p:139-:d:88539
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    Citations

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    Cited by:

    1. Liangyu Zhu & Tao Zhou & Xijia Ding & Xuemeng Qin & Jialei Zhang, 2019. "Study on the Movement and Deposition of Particles in Supercritical Water Natural Circulation Based on Grey Correlation Theory," Energies, MDPI, vol. 12(12), pages 1-18, June.
    2. Bjørn H. Hjertager, 2017. "Engineering Fluid Dynamics," Energies, MDPI, vol. 10(10), pages 1-2, September.
    3. Alfredo Iranzo & Francisco Javier Pino & José Guerra & Francisco Bernal & Nicasio García, 2018. "Cooling Process Analysis of a 5-Drum System for Radioactive Waste Processing," Energies, MDPI, vol. 11(10), pages 1-25, October.
    4. Giacomelli, Francesco & Mazzelli, Federico & Milazzo, Adriano, 2018. "A novel CFD approach for the computation of R744 flashing nozzles in compressible and metastable conditions," Energy, Elsevier, vol. 162(C), pages 1092-1105.
    5. Guang Hu & Yue Ma & Qianfeng Liu, 2021. "Evaluation on Coupling of Wall Boiling and Population Balance Models for Vertical Gas-Liquid Subcooled Boiling Flow of First Loop of Nuclear Power Plant," Energies, MDPI, vol. 14(21), pages 1-29, November.

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