0202 気泡プルームによる広域密度成層の破壊(OS2-1 混相流の多次元可視化計測,OS2 混相流の多次元可視化計測)

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  • 0202 Destruction of broad density stratification by means of a bubble plume

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Experimental and numerical flow visualizations on density destratification process provided by a bubble plume in horizontally long environment are presented. The experiment has shown that the initial density stratification can be broken broadly by creation of intermediate density layer inside turbulent bubble plume since the intermediate layer naturally induce density current in the horizontal direction. The process has been simulated in a 2-D rectangular tank, which further revealed that oscillation of bubble plume promoted the current. 3-D simulation applied for a dam has shown activation of destratification by the intermediate density layer regardless of geometry of the dam.

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