Numerical simulation of a self-leveling experiment using a hybrid method

スポンサーリンク

概要

• 論文の詳細を見る

• The postulated core disruptive accidents (CDAs) are regarded as particular difficulties in the safety analysis of liquid-metal fast reactors (LMFRs). In the CDAs, the self-leveling behavior of debris bed is a crucial issue, which greatly affects the relocation process and heat-removal capability of molten core. SIMMER-III is a fast reactor safety analysis code and successfully applied to a series of the CDA assessments. It is a 2D, multi-velocity-field, multiphase, multicomponent, Eulerian, fluid dynamics code coupled with a fuel-pin model and a space- and energy-dependent neutron kinetics model. However, strong interactions between solid particles, as well as particle characteristics, in multiphase flows with particles are not taken into consideration in SIMMER-III. In this article, a hybrid method is developed by coupling the discrete element method (DEM) with the multi-fluid model of SIMMER-III, and the numerical simulation of a simplified self-leveling experiment is presented. In the coupling algorithm, the governing equations of gas and liquid phases are solved by a time-factorization (time-splitting) method. Contact forces between particles and interactions between particles and fluid are considered in the DEM. Reasonable agreement between simulation results and corresponding experimental data can demonstrate the validity of the present method in simulating the self-leveling behavior of debris bed.

• 一般社団法人 日本機械学会の論文

著者

• Tobita Yoshiharu

  Advanced Nuclear System R&d Directorate Japan Atomic Energy Agency

• GUO Liancheng

  Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University

• Guo Liancheng

  Department Of Applied Quantum Physics And Nuclear Engineering Kyushu University

• Morita Koji

  Department Of Anesthesiology And Intensive Care Hamamatsu University School Of Medicine

• TAGAMI Hirotaka

  Advanced Fast Reactor Cycle System Research and Development Center, Japan Atomic Energy Agency

• TAGAMI Hirotaka

  Advanced Nuclear System R&D Directorate, Japan Atomic Energy Agency

• TOBITA Yoshiharu

  Advanced Fast Reactor Cycle System Research and Development Center, Japan Atomic Energy Agency

• Morita Koji

  Department of Advanced Prosthodontics, Division of Cervico-Gnathostomatology, Programs for Applied Biomedicine, Hiroshima University Graduate School of Biomedical Sciences

関連論文

• Simulation of Molten Metal Penetration and Freezing Behavior in a Seven-Pin Bundle Experiment
• Self-Leveling Onset Criteria in Debris Beds
• Experimental Analyses by SIMMER-III on Debris-Bed Coolability and Metallic Fuel Freezing Behavior
• The Effect of Bubble Size on the Radial Distribution of Void Fraction in Two-Phase Flow in a Circular Tube
• Simulation of the Dynamic Behavior of the Solid Particle Bed in a Liquid Pool : Sensitivity of the Particle Jamming and Particle Viscosity Models
• Thermophysical Properties of Lead-Bismuth Eutectic Alloy in Reactor Safety Analyses
• Numerical Simulation of Rheological Behavior in Melting Metal Using Finite Volume Particle Method
• Numerical Analysis of Long Range Acoustic Propagation Based on Wide Angle Parabolic Wave Equation
• Sound Propagation Characteristics in Sound Fixing and Ranging Channel across Geostrophic Current
• Effectiveness of fosfomycin combined with other antimicrobial agents against multidrug-resistant Pseudomonas aeruginosa isolates using the efficacy time index assay
• Geometric Structures of Grain Boundaries Expected from the O-Lattice Theory Compared with High-Resolution Transmission Electron Microscope Images
• Initial bone regeneration around fenestrated implants in Beagle dogs using basic fibroblast growth factor-gelatin hydrogel complex with varying biodegradation rates
• Experimental Studies and Empirical Models for the Transient Self-Leveling Behavior in Debris Bed
• Amsorb Plus and Dragersorb Free, two new-generation carbon dioxide absorbents that produce a low compound A concentration while providing sufficient CO_2 absorption capacity in simulated sevoflurane anesthesia
• Particle Effects on Penetration and Solidification of Flowing Mixed Melts on Metal Structures
• Experimental Studies and Empirical Models for the Transient Self-Leveling Behavior in Debris Bed
• 3D Simulation of Solid-Melt Mixture Flow with Melt Solidification Using a Finite Volume Particle Method
• Optimization of a Tip with Carbon Nanofibers for Improved Field Emission Properties
• Improvement of Basic Fluid Dynamics Models for the COMPASS Code
• Development of a Computational Framework on Fluid-Solid Mixture Flow Simulations for the COMPASS Code
• Experimental study and empirical model development for self-leveling behavior of debris bed using gas-injection
• Numerical simulation of a self-leveling experiment using a hybrid method
• Comparative evaluation of bone regeneration using spherical and irregularly shaped granules of interconnected porous hydroxylapatite. A beagle dog study

もっと見る 閉じる

スポンサーリンク