Accession Number : AD0693306

Title :   TURBULENT FLOW DRAG REDUCTION AND DEGRADATION WITH DILUTE POLYMER SOLUTIONS,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS ENGINEERING SCIENCES LAB

Personal Author(s) : Paterson,Robert W.

Report Date : JUN 1969

Pagination or Media Count : 197

Abstract : The purpose of the study was to attempt to find an explanation for the phenomenon first reported by Toms in 1948 in which the addition of a few grams of a long chain polymer to a million cubic centimeters of a Newtonian solvent caused a large decrease in the turbulent pipe flow pressure drop while causing only a small increase in the laminar flow viscosity. This phenomenon, which has been observed to occur for a number of different polymers and solvents, is commonly referred to as 'drag reduction with dilute polymer solutions' or 'the Toms phenomenon'. (Author)

Descriptors :   (*TURBULENCE, DRAG), (*POLYMERS, SKIN FRICTION), DAMPING, LAMINAR FLOW, SECONDARY FLOW, SOLUTIONS(MIXTURES), MOLECULAR WEIGHT, REYNOLDS NUMBER, PIPES, SHEAR STRESSES, LUBRICANTS, CONCENTRATION(CHEMISTRY)

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE