抄録
The injection of microbubbles is a promising method in reducing the frictional resistance of a vessel. In this research, in order to solve the mechanism of the resistance reduction, which is not yet clear, the effects of microbubble diameter and of the near wall void fraction were investigated using a two-dimensional flow channel. The reduction rate correlated well with the near wall void fraction. Whereas, the bubble diameter didn't affect to the reduction rate.
