Abstract
Pressure drops and frictional coefficients were in-vestigated for water and several types of aqueous solutions of surfactants, which have spherical micelles and wormlike micelles, in the flows through capillaries ranged from 0.430 mm to 2.87 mm. Good agreement for water flow was obtained between the experimental results and the predictions of laminar flows and Blasius expressions. For the spherical micelle surfactant solutions, pseudo-laminarization was slightly suggested until 2.7 X 103 of Reynolds number. Furthermore, the wormlike micelle surfactant solutions exhibited the huge drag reduction, and pseudo-laminarization was strongly suggested. In the explaining their drag reduction, non-Newtonian properties were discussed. Their estimated properties of the wormlike micelle surfactant solutions was supported to the discussion.
