後流渦によって誘発されるガス巻込みに対する二相格子ボルツマン法の検証
YOS PANAGAMAN SITOMPUL(Japan Atomic Energy Agency)

Japan aims to deploy next-generation sodium-cooled fast reactors, with gas entrainment posing a critical challenge to reactor operation. At the Japan Atomic Energy Agency (JAEA), we developed a two-phase Lattice Boltzmann Method (LBM) for simulating gas entrainment, validated using the quasi-steady vortex problem. It demonstrated high accuracy and efficiency, achieving simulations with up to 400 million cells on multi-GPU systems. We will extend the validity and capability of our two-phase LBM by addressing dynamic scenarios such as wake-vortex-induced gas entrainment and implementing Adaptive Mesh Refinement (AMR). We aim to establish a robust, efficient tool for reactor design and safety analysis.

研究紹介ポスター／最終報告書

(1) 学術論文 （査読あり）
該当なし
(2) 国際会議プロシーディングス （査読あり）
[]Yos Sitompul, Kenta Sugihara, Yasuhiro Idomura and Seiya Watanabe, "Two-phase Lattice Boltzmann Method for Gas Entrainment Simulation: Grid Convergence Study via Quasi-Steady Vortex Problem", 8th International Energy Conference (ASTECHNOVA 2025, 10/8-9, Yogyakarta, Indonesia).
(3) 国際会議発表（査読なし）
[]Yos Sitompul, Kenta Sugihara, Yasuhiro Idomura and Seiya Watanabe, "Validation of Two-Phase Lattice Boltzmann Simulation for Gas Entrainment Using a Quasi-Steady Vortex Flow Under Varying Inlet and Outlet Conditions", 9th Asian Pacific Congress on Computational Mechanics/7th Australasian Conference on Computational Mechanics (APCOM2025, 12/7-10, Brisbane, Australia).
(4) 国内会議発表（査読なし）
[]Yos Sitompul, Kenta Sugihara, Yasuhiro Idomura, Seiya Watanabe, "Validation of a Two-Phase Lattice Boltzmann Method with Local Mesh Refinement for Gas Entrainment Simulation via Quasi-Steady Vortex Flow"、混相流シンポジウム2025（9/3-5、神戸）
(5) 公開したライブラリなど
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(6) その他（特許，プレスリリース，著書等）
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