Accession Number : ADA017105
Title : Drag Reduction in Turbulent Flow of Polymer Solutions.
Descriptive Note : Final rept. 1 Sep 69-31 Aug 75,
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING
Personal Author(s) : Merrill,Edward W. ; Smith,K. A. ; Armstrong,R. C.
Report Date : 24 OCT 1975
Pagination or Media Count : 149
Abstract : Polyelectrolytes as drag reducing agents were studied; abnormal effects occurred only in dilute aqueous solutions free of added electrolyte. Extensional flows of polyisobutylene observed by light scattering indicate greater elongation than in shear flow, but work is unfinished. Onset of drag reduction studied with 'monodisperse' poly cis isoprene solutions indicate time based hypothesis gives better correlation than length based hypothesis and that there may be two different onset levels.
Descriptors : *Drag reduction, *Turbulent flow, *Polymers, Solutions(Mixtures), Length, Time lag theory, Toluenes, Benzene, Dispersion relations, Organic solvents, Viscosity, Prandtl number, Chromatographs, Electrolytes, Theses
Subject Categories : Physical Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE