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