In order to ensure safety of nuclear installations, thermohydraulics has developed many ways how to predict the behavior of coolant in a heated boiling channel. Accuracy of these predictions can be improved using three-dimensional Computational Fluid Dynamics (CFD) method, which is based on first principles of fluid mechanics. Even though when using CFD, there is a struggle between the accuracy and low computation costs, in many cases CFD can provide feasible improvement of accuracy compared to more traditional approaches. In this research, the focus is set on channel boiling problems, especially those associated with boiling transitions. The phenomenon of critical heat flux (CHF) is investigated using two-phase CFD computation and is compared to experimental data. There is also comparison with other computation methods. When experiment provides some set of data, CFD calculation provides description of the whole flow behavior that provides significantly more information and is of great value during the design process when it gives the understanding of undergoing effects. Besides CHF, general ability of CFD to predict changes in boiling patterns in two-phase channel boiling flows is discussed.
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2014 22nd International Conference on Nuclear Engineering
July 7–11, 2014
Prague, Czech Republic
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4595-0
PROCEEDINGS PAPER
Two-Phase CFD of Channel Boiling for Boiling Transition Problems
Antonin Povolny,
Antonin Povolny
CTU in Prague, Prague, Czech Republic
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Martin Cuhra
Martin Cuhra
CTU in Prague, Prague, Czech Republic
Search for other works by this author on:
Antonin Povolny
CTU in Prague, Prague, Czech Republic
Martin Cuhra
CTU in Prague, Prague, Czech Republic
Paper No:
ICONE22-30970, V005T17A059; 8 pages
Published Online:
November 17, 2014
Citation
Povolny, A, & Cuhra, M. "Two-Phase CFD of Channel Boiling for Boiling Transition Problems." Proceedings of the 2014 22nd International Conference on Nuclear Engineering. Volume 5: Innovative Nuclear Power Plant Design and New Technology Application; Student Paper Competition. Prague, Czech Republic. July 7–11, 2014. V005T17A059. ASME. https://doi.org/10.1115/ICONE22-30970
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