Results 21 to 30 of about 8,820,269 (182)

Thermal-hydraulic research on rod bundle in the LBE fast reactor with grid spacer

Nuclear Engineering and Technology, 2022
s: The research on the flow and heat transfer characteristics of lead bismuth(LBE) is significant for the thermal-hydraulic calculation, safety analysis and practical application of lead-based fast reactors(LFR).
Jie Liu, Ping Song, Dalin Zhang, Shibao Wang, Chao Lin, Yapeng Liu, Lei Zhou, Chenglong Wang, Wenxi Tian, Suizheng Qiu, G.H. Su   +10 more
doaj   +1 more source

Two-dimensional magnetohydrodynamic turbulence in the limits of infinite and vanishing magnetic Prandtl number [PDF]

, 2013
LAKB was supported by an EPSRC post-graduate studentship.We study both theoretically and numerically two-dimensional magnetohydrodynamic turbulence at infinite and zero magnetic Prandtl number $Pm$ (and the limits thereof), with an emphasis on solution ...
Tran, Chuong Van, Yu, Xinwei, Blackbourn, Luke Austen Kazimierz   +2 more
core   +1 more source

Diffusion Processes in the A-Model of Vector Admixture: Turbulent Prandtl Number

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, Jurčišin Marián, Remecky Richard   +2 more
doaj   +1 more source

Anisotropic turbulent viscosity and large-scale motive force in thermally driven turbulence at low Prandtl number

Archives of Mechanics, 2022
The fully developed turbulent Boussinesq convection is known to form large-scale rolls, often termed the ‘large-scale circulation’ (LSC). It is an interesting question how such a large-scale flow is created, in particular in systems when the energy input
K.A. Mizerski
doaj   +1 more source

Development of New Turbulent Prandtl Number Models for Low- and Medium-Prandtl-Number Fluids via Multi-Gene Gene Expression Programming

Applied Sciences
The study of turbulent Prandtl number is important for turbulent flows with heat transfer. Despite its importance, no universal model exists that is able to capture its behavior for a range of molecular Prandtl numbers.
Burak Pehlivan, Özgür Ekici
doaj   +1 more source

Model-based scaling of the streamwise energy density in high-Reynolds-number turbulent channels [PDF]

, 2013
We study the Reynolds number scaling of a gain-based, low-rank approximation to turbulent channel flows, determined by the resolvent formulation of McKeon & Sharma (2010), in order to obtain a description of the streamwise turbulence intensity from ...
Sharma, Ati S., Tropp, Joel A., Moarref, Rashad, McKeon, Beverley J.   +3 more
core   +1 more source

Study on the turbulent Prandtl number model for liquid metal flow and heat transfer in a narrow rectangular channel

Frontiers in Energy Research
In order to improve the core power density of liquid metal reactors, plate-type fuel assemblies are typically used, which have obvious advantages in heat transfer capacity.
Zhang Xue, Yu Hongxing, Deng Jian, Du Sijia, Wang Xiaoyu, Feng Wenpei   +5 more
doaj   +1 more source

Numerical Heat Transfer Study of Liquid Metal in Triangular Rod Bundle Based on k-ε-kθ-εθ Model

Yuanzineng kexue jishu, 2022
Compared with the constant turbulent Prandtl number (Prt) model, a four-equation model considers the difference between the velocity and temperature boundary layer of liquid metals by introducing the turbulence time-scale, which is expected to improve ...
SU Xingkang;GU Long;LI Xianwen;ZHANG Lu;SHENG Xin
doaj  

Turbulent passive scalar field of a small prandtl number

, 1986
The statistical-mechanics theory of the passive scalar field convected by turbulence, developed in an earlier paper [Phys. Fluids 28, 1299 (1985)], is extended to the case of a small molecular Prandtl number.
Qian J, QIAN, J (reprint author), BEIJING INST ENVIRONM FEATURES,POB 142,BRANCH BOX 207,BEIJING,PEOPLES R CHINA.   +1 more
core   +1 more source

Lagrangian Modeling of Turbulent Dispersion from Instantaneous Point Sources at the Center of a Turbulent Flow Channel

Fluids, 2017
The paper is focused on the simulation and modeling of the dispersion from an instantaneous source of heat or mass located at the center of a turbulent flow channel.
Quoc Nguyen, Samuel E. Feher, Dimitrios V. Papavassiliou   +2 more
doaj   +1 more source