Empirical correlations for friction factor in drag-reducing turbulent pipe flows
作者： A.J Ghajar , M.Y Azar
DOI: 10.1016/0735-1933(88)90014-0
关键词: Mechanics 、 Mathematics 、 Drag 、 Weissenberg number 、 Friction factor 、 Turbulence 、 Polymer solution 、 Thermodynamics 、 Reynolds number
摘要: Abstract Measurements for friction factor solutions of Separan AP-273 and AP-30 at various concentrations are presented. From these data the critical Weissenberg number is found to be order 7–13 (20,000≤ Re a ≤ 40, 000) 5–10 (10,000 20,000), respectively. For each polymer solution an empirical correlation in terms Reynolds number, developed. The proposed correlations predict experimental with good accuracy.
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