The SquAd derivation: A Square Additive approach to the turbulent Prandtl number [version 3; peer review: 1 approved, 3 approved with reservations, 1 not approved] [PDF]
Open Research Europe, 2023 Liquid metals have been chosen as primary coolant of innovative nuclear systems under current development. They present a very high thermal conductivity and hence a very low molecular Prandtl number.
Vincent Moreau
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EnergiesLiquid metal is widely used as the primary coolant in many advanced nuclear energy systems. Prandtl number of liquid metal is much lower than that of the conventional coolant of water or gas. Based on the Reynolds analogy, the turbulent Prandtl number is
Sifan Peng, Xuefeng Lyu, Houjian Zhao
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Turbulent Prandtl number from isotropically forced turbulence
Journal of Fluid Mechanics, 2022 Turbulent motions enhance the diffusion of large-scale flows and temperature gradients. Such diffusion is often parameterized by coefficients of turbulent viscosity ( $\nu _{t}$ ) and turbulent thermal diffusivity ( $\chi _{t}$ ) that are analogous to their microscopic counterparts.
Petri J. Käpylä, Nishant K. Singh
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On the turbulent Prandtl number in homogeneous stably stratified turbulence [PDF]
Journal of Fluid Mechanics, 2010 In this paper, we derive a general relationship for the turbulent Prandtl number Prt for homogeneous stably stratified turbulence from the turbulent kinetic energy and scalar variance equations. A formulation for the turbulent Prandtl number, Prt, is developed in terms of a mixing length scale LM and an overturning length scale LE, the ratio of the ...
Venayagamoorthy, Subhas K. +1 more
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Proposal of a turbulent Prandtl number model for Reynolds-averaged Navier–Stokes approach on the modeling of turbulent heat transfer of low-Prandtl number liquid metal [PDF]
Frontiers in Energy Research, 2022 Because of their high molecular heat conductivity, low-Prandtl number liquid metal is a promising candidate coolant for various designs of advanced nuclear systems such as liquid metal–cooled fast reactors and accelerator-driven sub-critical system (ADS).
Xi Huang +5 more
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Diffusion Processes in the A-Model of Vector Admixture: Turbulent Prandtl Number [PDF]
EPJ Web of Conferences, 2018 Using analytical approach of the field theoretic renormalization-group technique in two-loop approximation we model a fully developed turbulent system with vector characteristics driven by stochastic Navier-Stokes equation. The behaviour of the turbulent
Jurčišinová Eva +2 more
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Method of calculation of turbulent Prandtl number for the SST turbulence model
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 We present a new model for turbulent Prandtl number that provides an improvement of prediction capabilities of the SST turbulence model in application to wall heat transfer problems. The model developed gives an explicit expression for the local value of
Zaitsev Dmitri, Smirnov Evgeny
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Numerical Investigation of Turbulent Heat Transfer Properties at Low Prandtl Number
Frontiers in Energy Research, 2020 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.
Xiang Chai +3 more
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Turbulent Prandtl Number and its Use in Prediction of Heat Transfer Coefficient for Liquids
مجلة النهرين للعلوم الهندسية, 2007 A theoretical study is performed to determine the turbulent Prandtl number (Prt ) for liquids of wide range of molecular Prandtl number (Pr=1 to 600) under turbulent flow conditions of Reynolds number range 10000- 100000 by analysis of experimental ...
Basim O. Hasan
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Turbulent-Prandtl-number models for liquid lead-bismuth in triangular rod bundles
He jishu, 2022 BackgroundIn order to accurately predict the heat transfer characteristics in the sub-channel of fuel assembly for the low Prandtl number fluid, it is necessary to select a suitable turbulent-Prandtl-number model.PurposeThis study aims at the ...
LIU Shuyong +5 more
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