Results 1 to 10 of about 3,296 (231)
EnergiesIn response to the growing demand for advanced nuclear reactor technologies, this study addresses significant gaps in thermal-hydraulic modelling for dual fluid reactors (DFRs) by integrating Kays correlation to implement a variable turbulent Prandtl ...
Hisham Elgendy +2 more
doaj +2 more sources
Effects of a Turbulent Field on Turbulent Prandtl Number
PROCEEDINGS OF THE JAPANESE CONFERENCE ON HYDRAULICS, 1989 This paper describes an investigation of the effects of characteristic values in a flow field on turbulent Prandtl number. The relational expressions of the dissipation rate of temperature fluctuation were obtained in an isotropic turbulent field when the turbulence became both sufficiently strong and weak.
openaire +2 more sources
Entropy, 2018 Statistics of heat transfer in two-dimensional (2D) turbulent Rayleigh-Bénard (RB) convection for Pr=6,20,100 and 106 are investigated using the lattice Boltzmann method (LBM).
Hui Yang +4 more
doaj +1 more source
Journal of Thermal Science and Technology, 2020 Pulsating turbulent channel flows under constant temperature difference (CTD) condition and uniform heat flux heating (UHF) condition are studied by direct numerical simulation (DNS).
Tatsuro YAMAZAKI +3 more
doaj +1 more source
AIP Advances, 2021 An experimental study of the three-dimensional spatial structure of low-frequency temperature oscillations in cylindrical Rayleigh–Bénard convection of a fluid with a Prandtl number Pr = 12.3, aspect ratio Γ ≡ D/L = 1.00 (D is the diameter, and L is the ...
Ping Wei
doaj +1 more source
Numerical Study of Liquid Metal Turbulent Heat Transfer in Cross-Flow Tube Banks
Energies, 2022 Heavy liquid metals (HLM) are attractive coolants for nuclear fission and fusion applications due to their excellent thermal properties. In these reactors, a high coolant flow rate must be processed in compact heat exchangers, and as such, it may be ...
Alessandro Tassone +3 more
doaj +1 more source
Fluctuation dynamo and turbulent induction at small Prandtl number [PDF]
Physical Review E, 2010 We study the Lagrangian mechanism of the fluctuation dynamo at zero Prandtl number and infinite magnetic Reynolds number, in the Kazantsev-Kraichnan model of white-noise advection. With a rough velocity field corresponding to a turbulent inertial-range, flux-freezing holds only in a stochastic sense.
openaire +3 more sources
RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM®
E3S Web of Conferences, 2015 Quantifying mixing processes relating to the transport of heat, momentum, and scalar quantities of stably stratified turbulent geophysical flows remains a substantial task. In a stably stratified flow, such as the stable atmospheric boundary layer (SABL),
Wilson Jordan M. +1 more
doaj +1 more source
Solid-Fuel Regression Rate for Standard-Flow Hybrid Rocket Motors
Journal of Thermal Science and Technology, 2012 Marxman's diffusion-limited analysis of hybrid rocket combustion has been often used to investigate various combustion problems in hybrid rocket motors.
Takakazu MORITA +3 more
doaj +1 more source
Turbulent Rayleigh–Bénard convection for a Prandtl number of 0.67
Journal of Fluid Mechanics, 2009 For the Rayleigh-number range 107 ≲ Ra ≲ 1011 we report measurements of the Nusselt number Nu and of properties of the large-scale circulation (LSC) for cylindrical samples of helium gas (Prandtl number Pr = 0.674) that have aspect ratio Γ ≡ D/L = 0.50 (D and L are the diameter and the height respectively) and are heated from below.
AHLERS, GUENTER +3 more
openaire +3 more sources