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Numerical Investigation of Turbulent Heat Transfer Properties at Low Prandtl Number

Chai, X.; Liu, X.; Xiong, J.; Cheng, X.

The sodium-cooled fast reactor (SFR), which is one of the most promising candidates for meeting the goal declared by the Generation IV International Forum (GIF), has drawn a lot of attention. Turbulent heat transfer in liquid sodium, which is a low-Prandtl fluid, is an extremely complex phenomenon. The limitations of the commonly used eddy diffusivity approach have become more evident when considering low-Prandtl fluids. The current study focuses on the assessment and optimization of the existing modeling closure for single-phase turbulence in liquid sodium based on reference results provided by the LES method. In this study, a wall-resolved Large-Eddy Simulation was performed to simulate the flow and heat transfer properties in a turbulent channel at low Prandtl number. The simulation results were first compared with the DNS results obtained from the literature. A good agreement demonstrated the capability of the employed numerical approach to predict the turbulent and heat transfer properties in a low-Prandtl number fluid. Consequently, new reference results were obtained for the typical Prandtl number and wall heat flux of an SFR. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000122971
Veröffentlicht am 22.09.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Thermofluidik (IATF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2296-598X
KITopen-ID: 1000122971
Erschienen in Frontiers in energy research
Verlag Frontiers Media
Band 8
Seiten Art.Nr. 112
Vorab online veröffentlicht am 03.07.2020
Nachgewiesen in Web of Science
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