502 様々な熱的境界条件下における前向きステップ乱流温度境界層のDNS(OS6.各種スケールにおける熱流動現象(1),オーガナイズドセッション)

概要

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This paper presents a direct numerical simulation (DNS) of turbulent thermal boundary layers over a forward-facing step in various wall thermal conditions. A wall which generally supplies heat to the fluid has various boundary conditions, i.e., constant temperature, constant heat-flux, adiabatic conditions, etc. Since a wall thermal condition influences the development of thermal boundary layer, the effect must be systematically investigated. In this study, we have carried out DNS of turbulent thermal boundary layers over a forward-facing step in three wall thermal conditions: a uniform temperature condition on all walls, a uniform temperature condition upstream of the step followed by an adiabatic one, and an adiabatic condition followed by a uniform temperature one. The results of the present DNS clearly show the presence of characteristic turbulent heat transfer processes depending on the individual cases.
一般社団法人日本機械学会の論文
2008-11-01