AM05-24-005 チャネル内上昇気泡流中において界面活性剤が気泡運動に及ぼす影響(混相流・機能性流体1,一般講演)

概要

論文の詳細を見る
It is known that, in upward pipe or channel flow, bubbles migrate toward the wall and the distribution of the local void fraction has saddle shape. In our experiment, 1mm mono-dispersed bubbles were generated in the channel by addition of surfactant. In the case with a small amount of 3-Pentanol, the bubbles accumulated near the wall and formed bubble clusters. On the other hand, in the case with TritonX-100 or high concentration of 3-Pentanol bubbles did not migrate toward the wall. The surfactants cause Marangoni effect and change the boundary condition of the bubble surface. One of the factors of the bubble migration is thought to be the shear-induced lift force, it is indicated that this lift force strongly affected by the changes of boundary condition caused by the presence of the surfactants.
日本流体力学会の論文
2005-09-05