An Experimental Study on Microscopic Flow Over and Inside Porous Medium Placed on Oscillatory Flow

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  • 振動流場における粒状層内外の微細流動に関する実験的研究

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In order to investigate interaction between upper and inside flow of a porous medium, the microscopic structure of upper and inside flow of the porous medium placed in oscillatory flow was measured by the Particle Tracking Velocimetry (PTV) with the refractive index matching method. The strong shear flow was observed in the vicinity of the porous medium and the depth of shear flow varied with the phase of the oscillatory flow. The depth of non-dimensional shear flow was almost constant and independent with the Reynolds number. Besides, the phase difference of oscillatory flow between upper and inside flow of the porous medium was observed.

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