Abstract
This paper presents an experimental investigation on flow and heat transfer characteristics of surfactant solution - air two-phase flow. The test tube is 5.0mm in inner diameter, and consists of the flow developing and heating sections, which are 2000mm and 900mm in length, respectively. Two-phase flow was produced by injecting air into the in-tube flow of surfactant solution (TTAB+NaSa, the concentration is 500 and 1000 ppm). Friction factors and heat transfer coefficients were measured in the heating section (900mm in length). Heat transfer enhancement by injecting air was larger for surfactant solution flow than that for water flow. This indicates that air injection has the effects of not only mixing flow, but also breaking micelle structure for surfactant solution flow.
