0504 ゲル粒子層を流れるブルームが作る非線形のリズム(OS5 混相流の多次元可視化計測,オーガナイズドセッション)

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  • 0504 Plume's rhythm:nonlinear oscillation of the flow in deformable gel beads

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We have conducted laboratory experiments on spatio-temporal evolution of laminar plumes in a deformable gel beads layer. A thin experimental tank is filled with the mixture of deformable gei beads and a sugar syrup solution as the interstitial fluid. The buoyant plumes are generated by injection of a viscous fluid from a thin slit. When we injected a buoyant fluid, a gravitational instability like Rayleigh-Taylor instability occurs; Then the flow is localized and buoyant plumes are generated. The plume flow is relatively continuous at the source region, however, flow instability occurs along the plume axis and the pulsating flow is developed.

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