Abstract
Pressure drop were measured because flow properties of water and surfactant solutions were investigated in capillary flows. Good agreement between water results and predictions of laminar flows and Blasius expressions was obtained. As corresponding to molar concentration ratio, experimental results of surfactant solutions maintained laminar flows in transition regions. Thus, laminarization of surfactant solutions was shown, and relationship between the phenomenon and non-Newtonian properties was discussed. Moreover, viscosity curve was supported to the experimental results.
