1622 内部重力波の遷移過程における空間構造の実験的解明(G05-3 流体工学(3)非定常流れ,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Spatial structure of internal gravity waves was experimentally investigated in a strongly stably-stratified mixing layer with a stepwise mean temperature distribution. Multi-point simultaneous measurement was made on the temperature field by using a rake of 13 cold-wires system. Spatial structure and heat transfer mechanism in the transition process of the internal gravity waves were evaluated through coherence and joint probability density analyses. As the internal gravity waves developed downstream, the time-averaged heat flux was apparently suppressed despite of the positive temperature gradient. The random components produced by the destruction of the wave-front were dominated by the cold descending cells. Turbulence generation through the collapse of the internal gravity waves induced the negative heat flux in the stably-stratified mixing layer.
社団法人日本機械学会の論文
2008-08-02