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

Number of Access:698（2025-08-15 06:46 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/100582

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Title
Thermofluid simulation of hydrogen isotopologue mixtures during the solidification process
Creator
CreatorName
Zhang, Jiaqi
NRID
1000000260050 1000000260050
researchmap permalink
read0048831 read0048831
CreatorName
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
CreatorName
Shigemori, Keisuke
NRID
1000000334714 1000000334714
CreatorName
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
CreatorName
Yamanoi, Kohei
Subject
Hydrogen isotopologue
Inertial confinement fusion target
Isotopologue fractionation
Thermofluid simulation
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.
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.
Publisher
Elsevier Ltd
Source Title
Fusion Engineering and Design
Volume (Issue)
212
Page
114827
Date of Issued
2025-03-01
Language
English
Handle URL
https://hdl.handle.net/11094/100582
PISSN
09203796
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.fusengdes.2025.114827
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
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Category
学術雑誌論文 Journal Article