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

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...

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Autores principales:	Liancheng GUO, Koji MORITA, Hirotaka TAGAMI, Yoshiharu TOBITA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	self-leveling hybrid method postulated core disruptive accident simmer-iii discrete element method Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/26afd946f2214a458a5d3e1c4602f249
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spelling	oai:doaj.org-article:26afd946f2214a458a5d3e1c4602f2492021-11-26T06:09:52ZNumerical simulation of a self-leveling experiment using a hybrid method2187-974510.1299/mej.2014tep0024https://doaj.org/article/26afd946f2214a458a5d3e1c4602f2492014-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/4/1_2014tep0024/_pdf/-char/enhttps://doaj.org/toc/2187-9745The 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.Liancheng GUOKoji MORITAHirotaka TAGAMIYoshiharu TOBITAThe Japan Society of Mechanical Engineersarticleself-levelinghybrid methodpostulated core disruptive accidentsimmer-iiidiscrete element methodMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 4, Pp TEP0024-TEP0024 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	self-leveling hybrid method postulated core disruptive accident simmer-iii discrete element method Mechanical engineering and machinery TJ1-1570
spellingShingle	self-leveling hybrid method postulated core disruptive accident simmer-iii discrete element method Mechanical engineering and machinery TJ1-1570 Liancheng GUO Koji MORITA Hirotaka TAGAMI Yoshiharu TOBITA Numerical simulation of a self-leveling experiment using a hybrid method
description	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.
format	article
author	Liancheng GUO Koji MORITA Hirotaka TAGAMI Yoshiharu TOBITA
author_facet	Liancheng GUO Koji MORITA Hirotaka TAGAMI Yoshiharu TOBITA
author_sort	Liancheng GUO
title	Numerical simulation of a self-leveling experiment using a hybrid method
title_short	Numerical simulation of a self-leveling experiment using a hybrid method
title_full	Numerical simulation of a self-leveling experiment using a hybrid method
title_fullStr	Numerical simulation of a self-leveling experiment using a hybrid method
title_full_unstemmed	Numerical simulation of a self-leveling experiment using a hybrid method
title_sort	numerical simulation of a self-leveling experiment using a hybrid method
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/26afd946f2214a458a5d3e1c4602f249
work_keys_str_mv	AT lianchengguo numericalsimulationofaselflevelingexperimentusingahybridmethod AT kojimorita numericalsimulationofaselflevelingexperimentusingahybridmethod AT hirotakatagami numericalsimulationofaselflevelingexperimentusingahybridmethod AT yoshiharutobita numericalsimulationofaselflevelingexperimentusingahybridmethod
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Numerical simulation of a self-leveling experiment using a hybrid method

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