上昇球形ガス気泡の化学反応を伴う溶解過程に関する研究 : 第3報、強アルカリ性溶液中における二酸化炭素気泡上昇速度に対する表面イオン濃度分布の影響 : 流体工学,流体機械

概要

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Effects of ion concentration distribution at a bubble surface on rising speed of a carbon dioxide bubble in strong alkaline solution was investigated experimentally and numerically. We developed an experimental system that use a CCD camera coupled with a microscope to track the rising bubble and precisely estimated the drag coefficients when a CO, bubble dissolves in sodium hydroxide solution. We also numerically estimated the drag coefficients of the "Stagnant Cap Model". The results reveal that we observed that the behavior of the bubble returns to that of a fluid sphere after it is closed to that of a solid particle when the concentration of sodium hydroxide is high. And by comparing the numerical results, the ion concentration distribution at the surface changes the position of the stagnant cap angle and the flow around the bubble.
2001-07-25