Abstract
In surfactant solution (TTAB+NaSal), the pipe friction factor and heat transfer coefficients were investigated. The straight circular tube of D=5.05 mm in diameter and L=2900 mm in total length was used. In the drag reduction flow, in order to break micelle structures and to promote heat transfer, the "micelle breaker (MB)" was installed in the upper stream of the testsection. The effect of MB was investigated changing surfactant solution concentration (200, 500, lOOOppm). As a result of the experiments, In the case of 1000 ppm, Re=7700, installation of the micelle breaker increased NuPr^<-1/3> at x/D=10 (x/D indicates the distance from heating section.) by 1.9 times compared with the case where it does not install. But The effect of MB mostly disappears by x/D=130. The effect of MB appears so notably that concentration is low.
