Abstract
The addition of a small amount of surfactant to water shows the unique characteristics to reduce the skin friction of the flow tremendously. The heat transfer performance of the surfactant flow correspondingly becomes deteriorate in the drag-reducing flow. In the present study, the reduction of both friction coefficient and heat transfer rate was confirmed experimentally, and the local recovery of heat transfer rate was examined when an obliquely discharged jet was introduced in a confined flow field. The near-wall velocity profiles measured with PIV system were also discussed in comparison between the flow conditions of surfactant solution and pure water.
