Abstract: In this paper, the problem of axial annular flow of nonNewtonian fluids is examined. By utilizing the slot analogy, a Fanning friction factor—Reynolds number relationship for a power law fluid was developed and presented. ...

Abstract: Surfactants are superior to polymers in reducing drag and their advantages are very well established. As drag reducers, several factors, such as concentration, temperature, salinity, shear rate, etc., can affect their ...