E322 内部重力波の励起が成層流中における熱・運動量輸送に及ぼす効果

概要

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Effects of thermal disturbances on heat and momentum transfer mechanism were experimentally investigated in a strongly stably-stratified mixing layer with stepwise temperature distribution. Coherence between the vertical velocity component and the temperature fluctuation increased, when the disturbances sufficing the three-wave interaction condition of internal gravity waves were given upstream of the test section. Phase difference between the vertical velocity component and the temperature fluctuation approached-π/2 more rapidly, as the internal gravity waves were enhanced stronger. Increase in the heat flux components corresponding to the excitation frequencies apparently enhanced the streamwise growth of the internal gravity waves. Counter-gradient heat flux was clearly observed when the excited waves began to collapse.
日本流体力学会の論文
2001-07-31