Study on formation and development of surface wave of liquid metal lithium jet for IFMIF

The international fusion materials irradiation facility (IFMIF) presents an intense neutron source to develop fusion reactor materials. The liquid metal Lithium (Li) jet with a free surface is planned as a target irradiated by two deuteron beam to generate intense neutrons and it is thus important t...

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Autores principales:	Eiji HOASHI, Sachiko YOSHIHASHI-SUZUKI, Takafumi OKITA, Takuji KANEMURA, Hiroo KONDO, Nobuo YAMAOKA, Hiroshi HORIIKE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	ifmif liquid metal lithium free surface flow surface wave Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/2b7249e48fb44320ae9a85ce25dfbe8a
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spelling	oai:doaj.org-article:2b7249e48fb44320ae9a85ce25dfbe8a2021-11-26T06:09:52ZStudy on formation and development of surface wave of liquid metal lithium jet for IFMIF2187-974510.1299/mej.2014tep0017https://doaj.org/article/2b7249e48fb44320ae9a85ce25dfbe8a2014-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/4/1_2014tep0017/_pdf/-char/enhttps://doaj.org/toc/2187-9745The international fusion materials irradiation facility (IFMIF) presents an intense neutron source to develop fusion reactor materials. The liquid metal Lithium (Li) jet with a free surface is planned as a target irradiated by two deuteron beam to generate intense neutrons and it is thus important to obtain information on the surface wave characteristic for the safety and the efficiency of system in the IFMIF. We have been studying on surface wave characteristics experimentally using the liquid metal Li circulation facility at Osaka University and numerically using computational fluid dynamics (CFD) code, FLUENT. The CFD simulation has been used in order to establish the mechanism of the formation and development of the surface wave of the liquid Li jet. The introduction of a two-staged contraction nozzle is planned in the IFMIF. This nozzle has a concave wall at each contraction part, and it was then predicted that Görtler vortices in the boundary layer inside the nozzle was generated and flowed out from the nozzle exit at the high velocity condition in our previous simulation. The Li free surface flow simulation including the flow inside the nozzle set in our Li loop was conducted to compare simulation results with experimental results. In this simulation, large eddy simulation and volume o fluid models are used as turbulence model and interface tracking method, respectively. Our simulation result indicates that both transverse vortices due to gas-liquid shear stress and longitudinal vortices induced by Görtler vortices downstream the nozzle exit contribute to the formation of three-dimensional wave of the Li free surface flow at the jet velocity of 15 m/s. It was found that the vortex structure and the flow pattern under the free surface due to the flow inside the nozzle strongly contributed the development of the surface wave of the liquid Li jet.Eiji HOASHISachiko YOSHIHASHI-SUZUKITakafumi OKITATakuji KANEMURAHiroo KONDONobuo YAMAOKAHiroshi HORIIKEThe Japan Society of Mechanical Engineersarticleifmifliquid metal lithiumfree surface flowsurface waveMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 4, Pp TEP0017-TEP0017 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	ifmif liquid metal lithium free surface flow surface wave Mechanical engineering and machinery TJ1-1570
spellingShingle	ifmif liquid metal lithium free surface flow surface wave Mechanical engineering and machinery TJ1-1570 Eiji HOASHI Sachiko YOSHIHASHI-SUZUKI Takafumi OKITA Takuji KANEMURA Hiroo KONDO Nobuo YAMAOKA Hiroshi HORIIKE Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
description	The international fusion materials irradiation facility (IFMIF) presents an intense neutron source to develop fusion reactor materials. The liquid metal Lithium (Li) jet with a free surface is planned as a target irradiated by two deuteron beam to generate intense neutrons and it is thus important to obtain information on the surface wave characteristic for the safety and the efficiency of system in the IFMIF. We have been studying on surface wave characteristics experimentally using the liquid metal Li circulation facility at Osaka University and numerically using computational fluid dynamics (CFD) code, FLUENT. The CFD simulation has been used in order to establish the mechanism of the formation and development of the surface wave of the liquid Li jet. The introduction of a two-staged contraction nozzle is planned in the IFMIF. This nozzle has a concave wall at each contraction part, and it was then predicted that Görtler vortices in the boundary layer inside the nozzle was generated and flowed out from the nozzle exit at the high velocity condition in our previous simulation. The Li free surface flow simulation including the flow inside the nozzle set in our Li loop was conducted to compare simulation results with experimental results. In this simulation, large eddy simulation and volume o fluid models are used as turbulence model and interface tracking method, respectively. Our simulation result indicates that both transverse vortices due to gas-liquid shear stress and longitudinal vortices induced by Görtler vortices downstream the nozzle exit contribute to the formation of three-dimensional wave of the Li free surface flow at the jet velocity of 15 m/s. It was found that the vortex structure and the flow pattern under the free surface due to the flow inside the nozzle strongly contributed the development of the surface wave of the liquid Li jet.
format	article
author	Eiji HOASHI Sachiko YOSHIHASHI-SUZUKI Takafumi OKITA Takuji KANEMURA Hiroo KONDO Nobuo YAMAOKA Hiroshi HORIIKE
author_facet	Eiji HOASHI Sachiko YOSHIHASHI-SUZUKI Takafumi OKITA Takuji KANEMURA Hiroo KONDO Nobuo YAMAOKA Hiroshi HORIIKE
author_sort	Eiji HOASHI
title	Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
title_short	Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
title_full	Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
title_fullStr	Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
title_full_unstemmed	Study on formation and development of surface wave of liquid metal lithium jet for IFMIF
title_sort	study on formation and development of surface wave of liquid metal lithium jet for ifmif
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/2b7249e48fb44320ae9a85ce25dfbe8a
work_keys_str_mv	AT eijihoashi studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT sachikoyoshihashisuzuki studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT takafumiokita studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT takujikanemura studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT hirookondo studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT nobuoyamaoka studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif AT hiroshihoriike studyonformationanddevelopmentofsurfacewaveofliquidmetallithiumjetforifmif
_version_	1718409769292660736

Study on formation and development of surface wave of liquid metal lithium jet for IFMIF

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