Improvement of the two-fluid momentum equation for turbulent bubbly flows
A two-fluid model is widely employed to predict gas–liquid two-phase flows. Conventional
two-fluid equations, derived by assuming that all phases are interpenetrating continua …
two-fluid equations, derived by assuming that all phases are interpenetrating continua …
Development and evaluation of data-driven modeling for bubble size in turbulent air-water bubbly flows using artificial multi-layer neural networks
H Jung, S Yoon, Y Kim, JH Lee, H Park, D Kim… - Chemical Engineering …, 2020 - Elsevier
In the present study, we consider a new reliable model of the bubble size based on multi-
layer artificial neural networks (ANN). A multi-layer ANN is used to establish a function for …
layer artificial neural networks (ANN). A multi-layer ANN is used to establish a function for …
[HTML][HTML] Simulation of Small-Break Loss-of-Coolant Accident Using the RELAP5 Code with an Improved Wall Drag Partition Model for Bubbly Flow
YH Lee, NK Ryu, BJ Kim - Energies, 2024 - mdpi.com
The RELAP5 code is a computational tool designed for transient simulations of light water
reactor coolant systems under hypothesized accident conditions. The original wall drag …
reactor coolant systems under hypothesized accident conditions. The original wall drag …
Comparative study of the two-fluid momentum equations for multi-dimensional bubbly flows: Modification of Reynolds stress
SJ Lee, B Jae, IK Park, HY Yoon - Journal of Mechanical Science and …, 2017 - Springer
Two-fluid equations are widely used to obtain averaged behaviors of two-phase flows. This
study addresses a problem that may arise when the two-fluid equations are used for multi …
study addresses a problem that may arise when the two-fluid equations are used for multi …
CSNI status report “3D capabilities of thermalhydraulic system codes”: Lessons learned
C Herer - Nuclear Engineering and Design, 2023 - Elsevier
In September 2015, an activity was endorsed by the OECD/CSNI/WGAMA to prepare a state
of the art report presenting the 3D features of current thermal–hydraulic system codes. This …
of the art report presenting the 3D features of current thermal–hydraulic system codes. This …
On stable wrapper-based parameter selection method for efficient ANN-based data-driven modeling of turbulent flows
H Yun, Y Choi, Y Kim, S Kang - arxiv preprint arxiv:2308.02602, 2023 - arxiv.org
To model complex turbulent flow and heat transfer phenomena, this study aims to analyze
and develop a reduced modeling approach based on artificial neural network (ANN) and …
and develop a reduced modeling approach based on artificial neural network (ANN) and …
Application of Gabor finite element method for oil tank stratification in solar energy system
B Zhao, X Yang, D kui Gao, C jiang Shi, L zhi Xu… - Applied Thermal …, 2016 - Elsevier
In order to improve computing precision and efficiency, we introduce the Gabor wavelet finite
element into temperature stratification analysis of heat conducting oil tank. Firstly, the basic …
element into temperature stratification analysis of heat conducting oil tank. Firstly, the basic …
[HTML][HTML] Partition method of wall friction and interfacial drag force model for horizontal two-phase flows
The improvement of thermal-hydraulic analysis techniques is essential to ensure the safety
and reliability of nuclear power plants. The one-dimensional two-fluid model has been …
and reliability of nuclear power plants. The one-dimensional two-fluid model has been …
[HTML][HTML] New wall drag and form loss models for one-dimensional dispersed two-phase flow
BJ Kim, SW Lee, KD Kim - Nuclear Engineering and Technology, 2015 - Elsevier
It had been disputed how to apply wall drag to the dispersed phase in the framework of the
conventional two-fluid model for two-phase flows. Recently, Kim et al.[1] introduced the …
conventional two-fluid model for two-phase flows. Recently, Kim et al.[1] introduced the …
Improved modeling of wall effects on interfacial momentum exchange for wall-bounded bubbly flows based on resolved simulations
D Kim, J Kim - Chemical Engineering Science, 2022 - Elsevier
A two-fluid model based on an Eulerian-Eulerian approach must accurately model interfacial
momentum exchange, which includes drag force and shear-induced and wall-induced lift …
momentum exchange, which includes drag force and shear-induced and wall-induced lift …