Study for mechanisum of turbulent heat transfer in boundary layer with suddenly changing thermal wall and superposition of external forces and exploring high efficient of heat transfer condition in it

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420144
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Hattori Hirofumi 名古屋工業大学, 工学(系)研究科(研究院), 技術職員 (30467352)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 熱伝達 / 乱流 / 境界層 / 複合外力 / 直接数値シミュレーション / 乱流モデル / 数値計算 / 予測

Outline of Final Research Achievements

In this study, in order to explore and reveal mechanisum of turbulent heat transfer in boundary layer with suddenly changing thermal wall and superposition of two external forces and exploring high efficient of heat transfer condition, the direct numerical simulations of various turbulent heat transfer are carried out.Also, in order to reconstruct turbulence model which can reproduce the above mentioned phenomena, we attest to the scalar linearity in a turbulent thermal boundary layer, various turbulence models which are employed in RANS and LES are evaluated using DNS database we obtained, and we explore problems of turbulence model using evaluation results. As the notable achievement, it is found that mechanisum of turbulent heat transfer is remarkably changed with a variation of slight two external forces' balance.

Free Research Field

伝熱工学，乱流工学，計算力学