AM05-13-010 内部重力波の発達促進機構に関する実験的研究(大気・海洋の流れ2,一般講演)

概要

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The effect of internal gravity waves on energy transfer mechanism was experimentally investigated in a strongly stably-stratified mixing layer. The eigen-modes of the excited internal gravity waves were enhanced by giving small sinusoidal thermal fluctuations satisfying the three-wave resonant condition. Instantaneous phase difference between vertical velocity component, w, and temperature component, θ, of the excited internal gravity waves was locked up about -π. Increase in correlation between w and θ strengthened down-gradient heat flux in the initial stage of their streamwise development and the potential energy of mean fields became more efficiently transported to the kinetic energy of the wave motion. Then, the excited components were efficiently produced and the excited internal gravity waves began to develop more rapidly downstream than the unexcited waves. These results show that it is possible to regulate the transition process of the internal gravity waves by the present method.
日本流体力学会の論文
2005-09-05