Turbulent friction factor for two-phase: air-viscoelastic flows through a horizontal tube

The fully developed two-phase turbulent isothermal Fanning friction factors for air-viscoelastic fluid flows through a horizontal tube were measured experimentally. The viscoelastic fluids studied were aqueous solutions of polyacrylamide (100, 200, and 500 ppm by weight). Over the range of the apparent Reynolds number (Re_e) from 10,000 to 100,000, the homogeneous model was found to be accurate enough for engineering prediction of turbulent friction factor for air-viscoelastic flows through horizontal tubes. A new correlation for the turbulent friction factor of airlriscoelastic plug flow is proposed.