0127 気泡塔内の流動構造と濃度輸送との関係 : 気泡群/流体塊/溶解濃度の時空間スケール(OS1 噴流,後流および剥離流れ現象の探求と技術革新,オーガナイズドセッション)

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  • 0127 Relations between flow structure and concentration transportation in a bubble column : A time-spatial scale of a bubble swarm, fluid body and dissolved-gas concentration

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The purpose of this study is to clarify relations between flow structure and dissolved concentration transportation in a bubble column. We calculated the time-spatial scale of the bubble swarm, fluid body and dissolved concentration transportation based on the thinking of integral length scale, by using a newly developed Photoelectric Optical Fiber Probe (POFP) and LDV. The spatial scales of the bubble swarms and fluid bodies decreased toward the upper zone of the bubble column, and these scales varied with time. Furthermore the radial profiles at the horizontal sections differed in the height and time. We discussed the flow structure in the bubble column from these results. In addition, the spatial-scale of dissolved CO_2 concentration had the different characteristic by the height from the bottom of bubble column. Thus, the relations between the flow structure and dissolved concentration transportation were found out.

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