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Title:Benchmark DEBORA : Assessment of MCFD compared to high-pressure boiling pipe flow measurements
Authors:ID Bois, Guillaume (Author)
ID Fillion, P. (Author)
ID Burlot, Alan (Author)
ID Ben Hadj Ali, A. (Author)
ID Khaware, A. (Author)
ID Sanyal, J. (Author)
ID Rehm, M. (Author)
ID Farges, B. (Author)
ID Gajšek, Aljoša, Institut "Jožef Stefan" (Author)
ID Tekavčič, Matej, Institut "Jožef Stefan" (Author)
ID Končar, Boštjan, Institut "Jožef Stefan" (Author)
Files:.pdf PDF - Presentation file, download (2,59 MB)
MD5: 61E3156EDE22BB11BD790792FFA25505
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo IJS - Jožef Stefan Institute
Abstract:A benchmark activity on two-fluid simulations of high-pressure boiling upward flows in a pipe is performed by 12 participants using different MCFD (Multiphase Computational Fluid Dynamics) codes and closure relationships. More than 30 conditions from DEBORA experiment conducted by CEA are considered. Each case is characterised by the flow rate, inlet temperature, wall heat flux and outlet pressure. High-pressure Freon (R12) at 14 bar and 26 bar is boiled in a 19.2 mm pipe heated over 3.5 m. Flow rates range from 2000 kg m−2 s −1 to 5000 kg m−2 s −1 and exit quality � ranges from single-phase conditions to � = 0.1 which leads to a peak void fraction of � = 70%. In these high pressure conditions, bubbles remain small and there is no departure from the bubbly flow regime (François et al., 2011; Hösler, 1968). However, different kind of bubbly flows are observed: wall-peak, intermediate peak or core-peak, depending on the case considered. Measurements along the pipe radius near the end of the heated section are compared to code predictions. They include void fraction, bubble mean diameter, vapour velocity and liquid temperature. The benchmark covered two phases. In the first phase of the benchmark activities, experimental data were given to the participants, allowing to compare the simulation results and to develop, to select or to adjust the models in the CMFD codes. The second phase included blind cases where the participants could not compare to the measurements. In between the two phases, possible additional model adjustments or calibrations were performed. Overall, the benchmark involved very different closures and a wide range of models’ complexity was covered. Yet, it is extremely difficult to have a robust closure for all conditions considered, even knowing experimental measurements. The wall-to-core peak transition is not captured consistently by the models. The degree of subcooling and the void fraction level are also difficult to assess
Publication status:Published
Publication version:Version of Record
Submitted for review:31.01.2024
Article acceptance date:18.07.2024
Publication date:30.07.2024
Publisher:Elsevier
Year of publishing:2024
Number of pages:31 str.
Numbering:Vol. 179, Art. 104920
Source:Nizozemska
PID:20.500.12556/DiRROS-21785 New window
UDC:621.039
ISSN on article:0301-9322
DOI:10.1016/j.ijmultiphaseflow.2024.104920 New window
COBISS.SI-ID:203717635 New window
Copyright:© 2024 The Author(s).
Publication date in DiRROS:28.03.2025
Views:106
Downloads:64
Metadata:XML DC-XML DC-RDF
:
BOIS, Guillaume, FILLION, P., BURLOT, Alan, BEN HADJ ALI, A., KHAWARE, A., SANYAL, J., REHM, M., FARGES, B., GAJŠEK, Aljoša, TEKAVČIČ, Matej and KONČAR, Boštjan, 2024, Benchmark DEBORA : Assessment of MCFD compared to high-pressure boiling pipe flow measurements. International journal of multiphase flow [online]. 2024. Vol. 179, no. 104920. [Accessed 7 April 2025]. DOI 10.1016/j.ijmultiphaseflow.2024.104920. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=21785
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Record is a part of a journal

Title:International journal of multiphase flow
Shortened title:Int. j. multiph. flow
Publisher:Pergamon
ISSN:0301-9322
COBISS.SI-ID:25649408 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0026
Name:Reaktorska tehnika
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0405
Name:Fuzijske tehnologije
Funder:Other - Other funder or multiple funders
Name:NEPTUNE project
Funder:Other - Other funder or multiple funders
Funding programme:SAFIR2022 Programme

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:30.07.2024
Applies to:VoR

Secondary language

Language:Slovenian
Keywords:jedrska tehnika, hidravlika, pritisk


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