@article{oai:kindai.repo.nii.ac.jp:00012930,
 author = {荒賀, 浩一 and 村田, 圭治},
 journal = {近畿大学工業高等専門学校研究紀要, Research reports Kinki University Technical College},
 month = {Mar},
 note = {It is known that small quantities of surfactant additives can greatly reduce the friction factors during the flow of a heat transfer medium. This is because the generation of turbulent vortices is suppressed by the formation of rod-like micelles, and the flow remains laminar in the high Reynolds number range. However, the method by surfactant additive would be limited to just the closed loop system because of environmental impacts. On the other hand, the method by microbubble injection into water has attracted a lot of attention because of the low environmental effect. However, the drag reduction effect of microbubble injection into water flows often remains unclear, including their mechanisms. In addition, there are very few reports on drag reducing effect of microbubble injection into pipe flows. This paper describes the experimental results of water-microbubble two phase flows in a horizontal pipe. The streamline velocity was measured by using PIV system. As experimental results of the friction factor and velocity profile by using PIV, the drag reducing effect of microbubble injection was not observed in this experiment. The flow characteristics were quite similar to water single phase flow., application/pdf},
 pages = {1--3},
 title = {水-マイクロバブル2相流の流動特性--PIVによる速度分布測定},
 volume = {8},
 year = {2015},
 yomi = {アラガ, コウイチ and ムラタ, ケイジ}
}