Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process

Zhang, Jiaqi; Iwamoto, Akifumi; Shigemori, Keisuke; Hara, Masanori; Yamanoi, Kohei

doi:https://doi.org/10.1016/j.fusengdes.2025.114827

Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process

Zhang, Jiaqi; Iwamoto, Akifumi; Shigemori, Keisuke et al.

Fusion Engineering and Design, 2025, 212, 114827

アクセス数:689件（2025-07-27 07:22 集計）

固定URL: https://hdl.handle.net/11094/100582

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タイトル	Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process
著者	著者名 Zhang, Jiaqi
	NRID 1000000260050 1000000260050 researchmap permalink read0048831 read0048831 著者名 Iwamoto, Akifumi
	NRID 1000050335395 1000050335395 ORCID 0000-0002-3978-8427 0000-0002-3978-8427 researchmap permalink keisuke.shigemori keisuke.shigemori Scopus Author ID 7007069209 7007069209 著者名 Shigemori, Keisuke
	NRID 1000000334714 1000000334714 著者名 Hara, Masanori
	NRID 1000030722813 1000030722813 ORCID 0000-0003-4492-4099 0000-0003-4492-4099 researchmap permalink yamanoi-k yamanoi-k Scopus Author ID 35243839300 35243839300 著者名 Yamanoi, Kohei
キーワード等	Hydrogen isotopologue
	Inertial confinement fusion target
	Isotopologue fractionation
	Thermofluid simulation
内容	Zhang J., Iwamoto A., Shigemori K., et al. Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process. Fusion Engineering and Design 212, 114827 (2025); https://doi.org/10.1016/j.fusengdes.2025.114827.
抄録	A typical inertial confinement fusion target comprises a central deuterium-tritium (D-T) gas surrounded by a solid D-T layer inside an outer ablator shell. However, because of the isotope effect, fractionation of the hydrogen isotopologues can occur during the solidification process. This inhomogeneity in the solid D-T layer may lead to a deterioration in the fusion reaction. Thus, effective methods are required to characterize isotopologue distribution and homogeneity in solid D-T layers. The distribution of isotopologues in a solid hydrogen mixture can be simulated numerically using computational fluid dynamics. In this study, thermofluid simulations of the mixture's solidification process were performed to investigate the mechanism behind component distribution and to analyze the factors affecting the homogeneity. A numerical simulation was conducted to model inhomogeneity formation during the solidification of hydrogen isotopologue mixtures in a 3D wedge-shaped cavity. The simulations revealed inhomogeneities in H2-D2, D2-T2, and D2-DT-T2 mixtures during solidification. For an H2-D2 mixture, the simulation showed good agreement with experimental results, validating the computational model. These simulation methods will be used for homogeneity analysis of the solid D-T layer in fuel pellets.
出版者	Elsevier Ltd
収録物名	Fusion Engineering and Design
巻(号)	212
ページ	114827
刊行年月	2025-03-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/100582
PISSN	09203796
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.fusengdes.2025.114827
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Fusion Engineering and Design. 2025, 212, p. 114827
DC.title	Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process
DC.creator	Zhang, Jiaqi
	Iwamoto, Akifumi
	Shigemori, Keisuke
	Hara, Masanori
	Yamanoi, Kohei
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-03-01
DC.identifier	https://doi.org/10.1016/j.fusengdes.2025.114827
DC.subject	Hydrogen isotopologue
	Inertial confinement fusion target
	Isotopologue fractionation
	Thermofluid simulation
DC.description	Zhang J., Iwamoto A., Shigemori K., et al. Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process. Fusion Engineering and Design 212, 114827 (2025); https://doi.org/10.1016/j.fusengdes.2025.114827.
DCTERMS.abstract	A typical inertial confinement fusion target comprises a central deuterium-tritium (D-T) gas surrounded by a solid D-T layer inside an outer ablator shell. However, because of the isotope effect, fractionation of the hydrogen isotopologues can occur during the solidification process. This inhomogeneity in the solid D-T layer may lead to a deterioration in the fusion reaction. Thus, effective methods are required to characterize isotopologue distribution and homogeneity in solid D-T layers. The distribution of isotopologues in a solid hydrogen mixture can be simulated numerically using computational fluid dynamics. In this study, thermofluid simulations of the mixture's solidification process were performed to investigate the mechanism behind component distribution and to analyze the factors affecting the homogeneity. A numerical simulation was conducted to model inhomogeneity formation during the solidification of hydrogen isotopologue mixtures in a 3D wedge-shaped cavity. The simulations revealed inhomogeneities in H2-D2, D2-T2, and D2-DT-T2 mixtures during solidification. For an H2-D2 mixture, the simulation showed good agreement with experimental results, validating the computational model. These simulation methods will be used for homogeneity analysis of the solid D-T layer in fuel pellets.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	100582
citation_title	Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process
citation_author	Zhang, Jiaqi
	Iwamoto, Akifumi
	Shigemori, Keisuke
	Hara, Masanori
	Yamanoi, Kohei
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2025-03-01
citation_journal_title	Fusion Engineering and Design
citation_volume	212
citation_firstpage	114827
citation_doi	https://doi.org/10.1016/j.fusengdes.2025.114827
citation_public_url	https://hdl.handle.net/11094/100582

Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process

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