Comparative analysis of primary variables selection in modeling non-isothermal two-phase flow; Insights from EBS experiment at Horonobe URL

Kim, M.*; Lee, C.*; Sugita, Yutaka ; Kim, J.-S.*; Jeon, M.-K.*

This study investigates the impact of primary variables selection on the modeling of non-isothermal two-phase flow, by using the numerical work on the full-scale Engineered Barrier System (EBS) experiment conducted at Horonobe URL as part of the DECOVALEX-2023 project. A validated numerical model is employed to simulate the coupled thermo-hydrological behavior of heterogeneous porous media within the EBS. Two different primary variable schemes are compared in discretizing the governing equations, revealing significant difference in results.

Language	:	English
Journal	:	Geomechanics for Energy and the Environment
Volume	:	41
Number	:
Pages	:	p.100628_1 - 100628_9
Publication Year/Month	:	2025/03
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Paper URL	:	https://doi.org/10.1016/j.gete.2024.100628
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	Non-isothermal two phase flow; Primary variable; Horonobe URL; Thermo-hydro-mechanical coupling; Bentonite; Numerical simulation; DECOVALEX-2023
Research Facility	:	深地層研究所
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	Korea Atomic Energy Research Institute

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Registration No. : AA20240453
JAEA Abstracts No. : 53000464
Paper Submission No. : 29235

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