気流脈動による流動層内粒子流動構造の制御(流体工学,流体機械)

概要

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The effect of pulsating gas injection on the flow pattern was studied numerically. Discrete element method was applied to the solid-phase calculation. To examine the effect of particle condition, two case of solid particles were considered : one is Group B particles in Geldart's classification and the other is Group D particles. The multiple bubbling state without pulsation was chosen as the basis gas-flow condition. In order to characterize quantitatively the effect of the gas pulsation on the flow pattern, we analyzed power spectra of the distributions of void fraction and solid velocity. The results of the present simulations suggests that the gas pulsation largely modifies the solid flow patterns in a low frequency range. Especially in the case of Group B particles, the pattern of bubbles tends to be ordered by applying the gas pulsation.
一般社団法人日本機械学会の論文
2002-01-25