Paradigm shift in measurement techniques for thermophysical properties of molten metal using simulation/experiment assimilation approach

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18898
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 26:Materials engineering and related fields
• Research Institution: Tohoku University
• Principal Investigator: Abe Yoshiaki 東北大学, 流体科学研究所, 助教 (40785010)
• Co-Investigator(Kenkyū-buntansha): 石原 真吾 東北大学, 多元物質科学研究所, 助教 (40760301) ; 安達 正芳 東北大学, 多元物質科学研究所, 講師 (90598913)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: ガスジェット浮遊法 / 熱物性計測 / 数値流体力学

Outline of Final Research Achievements

We conducted a numerical investigation of the behavior of compressible flow around a floating molten metal and its dynamic stability. To do this, we employed deformation analysis using the particle method to develop a multiphysics numerical model that integrates both aspects. As an experiment to compare and integrate the numerical analysis mentioned above, we investigated the effect of the deviation from a spherical shape on the accuracy of property estimation with molten copper sulfide. A new correction method was proposed to account for the influence of gas flow and melt deformation, in contrast to the conventional thermophysical property prediction method that assumes a spherical shape.

Free Research Field

数値流体力学

Academic Significance and Societal Importance of the Research Achievements

本研究では溶融体の浮遊計測に関するデジタルツインを構築出来たことが大きな成果であり，世界的に初めての事例と考えられる．実際の実験値を用いたリアルタイムのデータ同化解析やより高度な数値モデルの実現には今後も継続的に研究を展開させていく必要があるものの，本研究で構築できた表面張力係数の予測修正法を含めた数値モデルは溶融体の浮遊実験に限定されるものではなく，金属や酸化物の高温溶融体とガス流れの干渉に関する様々な系への展開が期待される.