E111 作動流体を水とする自然対流乱流境界層のPIV計測(OS-10 自然対流および複合対流の伝熱・流動研究の新展開I)

Abstract

For turbulent natural convection boundary layers in water along vertical flat plates, experimental results except for heat transfer rates, mean temperature and mean velocity have not yet been reported. Therefore, it remains to be seen whether the turbulence characteristics are similar to those obtained for air which have been relatively well examined. In the present study, we have measured turbulence statistics such as mean velocity, velocity fluctuation intensities, Reynolds shear stress in a natural convection boundary layer in water with PIV. As a result, it is found that each profiles are similer to those measured for air and approximately coincide with those obtained from a time-developing direct numerical simulation for water.