Inzynieria Chemiczna i Procesowa, Vol.25, No.3, 733-738, 2004
Region of maximal drag reduction in flow of surfactant solutions
In this paper a number of flow experiments in straight tubes with aqueous solutions of the both, cationic and anionic, surface-active agents are presented. In the both, transitional and turbulent, flow ranges the region of the maximal drag reduction for surfactant solutions, has been determined. The upper and lower limits of the region were described by dimensionless correlation equations.