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Study on phase-change modeling compatible with interface-tracking method

伊藤 啓*; 江連 俊樹 ; 大平 直也*; 伊藤 大介*; 齊藤 泰司*

Ito, Kei*; Ezure, Toshiki; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*

本研究では、気液界面における相変化過程の精密な物理的メカニズムを考慮することで、シミュレーション精度と安定性を向上させた相変化モデルを提案し、シミュレーション精度向上の観点で界面での凝縮量を決定する界面近傍の温度勾配の計算手法について検討した。その上で、本モデルを基礎的な凝縮問題に適用した結果を従来の評価手法による評価結果と比較することで、本モデルの優位性を確認した。

In this study, the authors proposed a phase-change model in which the simulation accuracy and the stability are enhanced by taking into account the precise physical mechanism of phase-change process at gas-liquid interface. Then, the calculation method of temperature gradient near an interface, which determines the calculation of condensation quantity, is examined to enhance the simulation accuracy. Furthermore, the superiority of developed method to conventional methods is confirmed by simulating the basic condensation problem and comparing the simulation results.

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