Development of functional material processing based on the control of turbulent thermal convection with phase separation

2015 Fiscal Year Final Research Report

• Project/Area Number: 26820045
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Osaka University
• Principal Investigator: Takagi Youhei 大阪大学, 基礎工学研究科, 助教 (40435772)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 相分離 / スピノーダル分解 / 乱流 / 直接数値計算 / 渦構造 / 自己組織化構造 / 機能性材料

Outline of Final Research Achievements

We developed a novel control method of self-organized structure in a binary mixture fluid based on the turbulent vortical structure by using the active control of turbulent thermal convection with phase separation. The analysis model were well-mixed binary fluid and the material processing that accompanying spinodal decomposition caused by thermophysical instability such as quenching. From the numerical results of direct numerical simulation for turbulent flow with phase separation, it was found that the coarsening process of self-organized structure formation generated from the spinodal decomposition was suppressed by the formation of turbulent vortical structure. This suppression effect was remarkable on the large scale structure of vortex sheet. Therefore, the active control technique for changing the property of functional material might be developed by using the fluid energy injection into the large scale.

Free Research Field

化学工学、流体工学、数値流体力学