AM06-21-008 空間発達する温度成層乱流境界層における物質拡散のLES解析(乱流熱物質移動(2),一般講演)

概要

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Concerning the safety measures for diffusion of hazardous gases, we expect the estimation of peak values of concentration fluctuations using the time-dependent numerical model. In the past our research, we performed Large Eddy Simulation (LES) of spatially-developing turbulent boundary layer and we predicted the properties of the concentration field under the condition of neutral stability. Turbulence structure and transport process in thermally stratified turbulent boundary layers are much complicated because the effect of buoyancy drastically changes their flow field structures. Especially for safety establishment against hazardous gases, the effect of thermal stratification on concentration fluctuations is should be significantly examined. In this research, we carried out LES analysis of dispersion in spatially-developing stably stratified turbulent boundary layers. From the instantaneous and the statistic data, it was confirmed that spreading width of concentration was narrower in stable boundary layer than in neutral.
日本流体力学会の論文
2006-09-05