A comparison of methods for rapid calculation of frictional pressure drop and heat transfer coefficient for flow of non-newtonian fluids in ducts with non-circular cross sections

摘要

The paper presents a comparison of exact and approximate methods for calculating the frictional pressure drop with flow of purely viscous non-Newtonian fluids in passages with non-circular cross-sectional geometry. While comparing existing approximate methods for calculating the fully developed friction factor for chlculating the fully developed friction factor for power-law fluids, special emphasis is given to the widely used methods of Kozicki, Chou and Tiu (1966), Miller (1972) and the recent procedure by Delplace and Leuliet (1995).