Investigation of sustaining mechanism and development of prediction methods for turbulence of melting fluid by using simulation technology

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420104
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: University of Fukui
• Principal Investigator: Ohta Takashi 福井大学, 学術研究院工学系部門, 准教授 (10273583)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 乱流 / 溶融 / 非ニュートン粘性流体 / 直接数値シミュレーション / ラージエディシミュレーション

Outline of Final Research Achievements

We realized direct numerical simulations of turbulent flow considering liquid metal flow in order to investigate the sustaining mechanism of turbulence with the effect of melting or solidification in a boundary layer. The results can be applied to development and improvement of turbulence models based on the characteristics of turbulent structures. Thereby, it was found that, in the case of melting, a behavior of the turbulent structures promoted turbulence production. To the contrary, in the case of solidification, the flow tended to be laminar depending on the solidification velocity. In addition, since it was not necessary to estimate parameters like the wall friction velocity which were difficult to define in principle in these flows, we could validate an advantage of modified dynamic models.

Free Research Field

流体工学