The shear viscosities of a turbulence drag-reducing cationic surfactant solution

cetyltrimethyl ammonium chloride (CTAC)/sodium salicylate (NaSal) aqueous solution were measured with ARES rheometerThe concentration and temperature of the solution ranged from 5×10-5 to 2×10-4 and 20℃ to 40℃

respectivelyThe Giesekus model was found to fit the measured shear viscosities well for different temperatures and concentrations of the surfactant solutionThe model parameter values obtained by fitting were correlated with temperature at certain solution concentrations

and the relationship between drag reduction and rheological characteristics of the surfactant solution was establishedThe elongational viscosities of CTAC/NaSal surfactant solution were also experimentally investigated with an opposing jet RFX rheometer.