In Paper I, we presented comprehensive three-dimensional, three-component (3D, 3C) mean velocity profiles obtained through magnetic resonance velocimetry (MRV) within a 37-pin wire-wrapped rod bundle, elucidating the primary flow dynamics in sodium-cooled fast reactors. Building on this foundation, in this paper, we meticulously examine transverse velocity, helicity, and streamlines around rods, focusing particularly on the wake region of the wire within interior and edge subchannels. Our analysis uncovers a repetitive vortex evolution pattern in the wake, characterized by vortices forming, growing, weakening, and dissipating at 60° intervals of wire angular position. Furthermore, we highlight the significant variation in the azimuthal velocity component near the wire's wake, elucidating the dominant influence of wire orientation. Additionally, we identify the periodicity of flow split factor variations, demonstrating their dependence on wire orientation in interior subchannels and the prevailing impact of edge swirling in edge subchannels. Overall, our quantitatively derived experimental results provide valuable insights into flow patterns within the rod bundle, offering essential information for optimizing reactor design and analysis.
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September 2024
Research Article|
September 05 2024
Flow analysis in a 37-pin wire-wrapped rod bundle for sodium-cooled fast reactor using magnetic resonance velocimetry. II. Detailed characterization and influence of wire angular position
Chaehyuk Im (임채혁)
;
Chaehyuk Im (임채혁)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft)
1
Department of Mechanical Convergence Engineering, Hanyang University
, Seoul, South Korea
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Kyongwon Seo (서경원);
Kyongwon Seo (서경원)
(Conceptualization, Project administration, Supervision, Writing – review & editing)
2
Multi-purpose Small Reactor Development Division, Korea Atomic Energy Research Institute
, Daejeon, South Korea
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Jee-Hyun Cho (조지현)
;
Jee-Hyun Cho (조지현)
(Resources)
3
Bio-Chemical Analysis Team, Korea Basic Science Institute
, Cheongju, South Korea
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Ilhoon Jang (장일훈)
;
Ilhoon Jang (장일훈)
a)
(Formal analysis, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
4
Department of Mechanical Engineering, Kumoh National Institute of Technology
, Gumi, South Korea
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Simon Song (송시몬)
Simon Song (송시몬)
a)
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Validation, Visualization, Writing – review & editing)
1
Department of Mechanical Convergence Engineering, Hanyang University
, Seoul, South Korea
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Physics of Fluids 36, 095109 (2024)
Article history
Received:
May 06 2024
Accepted:
August 07 2024
Connected Content
This is a companion to:
Hydrodynamic instability triggered during thin-film formation by interfacial polymerization
Citation
Chaehyuk Im, Kyongwon Seo, Jee-Hyun Cho, Ilhoon Jang, Simon Song; Flow analysis in a 37-pin wire-wrapped rod bundle for sodium-cooled fast reactor using magnetic resonance velocimetry. II. Detailed characterization and influence of wire angular position. Physics of Fluids 1 September 2024; 36 (9): 095109. https://doi.org/10.1063/5.0217641
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