In this paper CFD analyses of mixed convection in bare tubes cooled with water at supercritical pressure is presented. The study was carried out using the FLUENT code for upward flow in vertical tubes with a heated length of 4 m and an inside diameter of 10 mm at relatively low water mass flux (G ≈500 kg/m2s) and heat fluxes q (from 239 to 310 kW/m2). Various models of turbulence have been tested. The results of the studies demonstrated a reasonable good agreement between CFD predictions and experimental data on the heat transfer coefficient and internal-wall temperature with use the SST turbulence model. Comparison of the CFD simulation data, which correspond to the presence or absence of the buoyancy forces, was performed. The regularities of the influence of these forces on the damping of turbulent transport, the deformation of the radial profiles of velocity and temperature along the channel length, the reduction of the heat transfer coefficients, etc. were studied. The features of the motion of the pseudo-phase transition within various conditions are presented.
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2018 26th International Conference on Nuclear Engineering
July 22–26, 2018
London, England
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5153-1
PROCEEDINGS PAPER
CFD Analysis of Supercritical-Water Flow and Heat Transfer in Vertical Bare Tube
Anastasiia Zvorykina,
Anastasiia Zvorykina
Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
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Dmytro Khmil,
Dmytro Khmil
National Academy of Sciences of Ukraine, Kiev, Ukraine
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Nataliia Fialko,
Nataliia Fialko
National Academy of Sciences of Ukraine, Kiev, Ukraine
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Igor Pioro,
Igor Pioro
University of Ontario Institute of Technology, Oshawa, ON, Canada
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Svitlana Stryzheus
Svitlana Stryzheus
National Academy of Sciences of Ukraine, Kiev, Ukraine
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Anastasiia Zvorykina
Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
Dmytro Khmil
National Academy of Sciences of Ukraine, Kiev, Ukraine
Nataliia Fialko
National Academy of Sciences of Ukraine, Kiev, Ukraine
Igor Pioro
University of Ontario Institute of Technology, Oshawa, ON, Canada
Svitlana Stryzheus
National Academy of Sciences of Ukraine, Kiev, Ukraine
Paper No:
ICONE26-81045, V009T16A003; 14 pages
Published Online:
October 24, 2018
Citation
Zvorykina, A, Khmil, D, Fialko, N, Pioro, I, & Stryzheus, S. "CFD Analysis of Supercritical-Water Flow and Heat Transfer in Vertical Bare Tube." Proceedings of the 2018 26th International Conference on Nuclear Engineering. Volume 9: Student Paper Competition. London, England. July 22–26, 2018. V009T16A003. ASME. https://doi.org/10.1115/ICONE26-81045
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