Abstract
Determining the appropriate friction factor value for calculating the frictional pressure loss of non-Newtonian fluids in a pipe is a critical task. This study aims to obtain an explicit friction factor correlation to accurately calculate the pressure losses for turbulent flow of yield pseudoplastic fluids in both smooth and rough pipes. A series of experiments are carried out with carboxymethyl cellulose (CMC) solutions using pipes of three different relative roughness. The Herschel-Bulkley model is found to be the most appropriate model to describe the yield pseudoplastic behavior of the CMC solutions used in this study. Based on the experimental friction pressure data obtained from the Izmir Katip C,elebi University flow loop, an explicit correlation is developed here. The new friction factor equation is compared with not only experiments in this study, but also experimental data presented by Okafor and Evers (1992), Subramanian (1995) and Vjargah et al. (2017). Results show that the proposed friction factor correlation is more consistent and better in agreement with experimental data than existing correlations in the literature.
NSTL
Elsevier