Explicit friction factor correlations for turbulent fluid flow in noncircular ducts and polymeric fluids

摘要

The friction factor for flow of a Newtonian fluid in circular pipes is defined as: f=(D/L)((ΔP/1/2ρv~2))where f is the Moody friction factor, D the pipe diameter, L the pipe length, AP the pressure drop, p the fluid density and v the fluid velocity. The friction factor in Eq. 1 is a function of the Reynolds number alone for smooth pipes and under laminar flow conditions (Re < 2,100), this relationship can be expressed as:f=16/Re where Re is the Reynolds number.