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加藤 正嗣*; 船越 寛司*; Liu, X.*; 松元 達也*; Liu, W.*; 守田 幸路*; 神山 健司
Proceedings of 11th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS-11) (Internet), 7 Pages, 2018/11
Computational fluid dynamics based on particle-based simulations with a fully Lagrangian approach is a powerful tool to understand thermal-hydraulic behaviors of multi-component, multi-phase flows involved in disrupted nuclear core during severe accidents. In this study, a validation study of 3D particle-based simulation using the finite volume particle method was performed for mixing flow behavior of two liquid phases with different densities in a pool. Fundamental experiments using water and silicon oil were also carried out for the present validation. An enhanced multi-phase scheme was introduced to provide accurate and stable calculations of multi-phase flows characterized by high density ratios. The simulation results of the experiments were given to demonstrate validity of the present simulation method and enhanced performance for simulations of mixing and separation behaviors of liquid-liquid two-phase flows in the pool.
加藤 正嗣*; 小川 竜聖*; 船越 寛司*; Liu, X.*; 松元 達也*; Liu, W.*; 守田 幸路*; 神山 健司
no journal, ,
密度の異なる2液相の混合・分離挙動解析に対する有限体積粒子法の適用性を向上するため、不規則な粒子配置によって生じる計算誤差を仮想粒子によって低減する計算手法を導入するとともに、模擬物質を用いた基礎実験と比較することで、3次元解析の妥当性について検証した。